12 Common Causes of Itchy Red Bumps on Skin

The skin is the largest human organ. In fact, it accounts for about 15% of all our body weight. What’s more? It’s our first line of defense against infection. Our skin also acts as a shield against microbes and harmful pathogens lurking in the outer environment.

Unfortunately, when infections make it through the outer barrier, the skin is also one of the most affected organs. Most times, when our skin is irritated, it appears as red itchy skin bumps.

However, having itchy red bumps may not be a symptom of an underlying infection in some cases. Most times, your itchy red bumps may be a nasty mosquito bite.

Regardless of the cause of the red bumps on your skin, having these discolorations and inflammation can make you look sick and affect your self-confidence too!

Once a part of your skin becomes swollen, reddened, or irritated, your skin is reacting to something it can’t handle.

Unfortunately, a rash is not a specific diagnosis. Rather, it can result from infections, allergies, or something more serious like skin cancer.

More so, skin rashes vary in appearance, depending on their source. While some skin bumps may be hard and firm, others may be soft and moveable. Additionally, the size of skin bumps can also vary. Some may appear small and pimple-like, while others may be as large as boils. Fortunately, whether your skin bump is large, small, irregular, or itchy, it’s probably harmless.

In fact, chances are you’ve had a skin lump before. However, if your skin bump has stayed for your skin for more than a few days, It’s time to see your doctor.

Itchy Red Bumps on Skin
Itchy Red Bumps on Skin: Causes and Treatments

12 Common Causes of Itchy Red Bumps on Your Skin

After acne, rashes are the second most common skin infection. Although rashes can affect any part of the body, they often affect the legs, arms, and torso.

Like many other infections, the cause of your itchy red skin may be bacterial, fungal, viral, or parasitic. Although taking over-the-counter treatments can help you eliminate unsightly skin lumps, it’s usually not so simple. The cause of your itchy red skin has a major role in determining the type of treatment you’ll take.

Let’s dig in! And find out what could be causing your skin to form red itchy bumps.

1. Hives (Urticaria)

Get Rid of Hives
How to Get Rid of Hives

Hives are red, swollen lumps or welts that appear on your skin. Although hives are usually itchy, sometimes, they burn and sting too. Usually, hives appear when your skin is irritated.

They can appear small, like mosquito bites or wide-ranging, spanning through several inches of your skin.

Hives can pop up on any part of your body – While they can appear on their own, in some cases, these hives may link up and span over much larger areas of your skin.

Like the itching hives aren’t bad enough, scratching your hives can cause them to spread and grow bigger.

Usually, hives can be triggered by allergic or non-allergic factors. While the non-allergic triggers may be more common, the exact cause is still a mystery.

The non-allergic factors include:

  • Exposure to sunlight
  • Viral infections
  • Fungal infections
  • Extreme temperatures
  • Too much exercise
  • Emotional stress

Although allergic hives don’t happen as frequently as non-allergic hives, the origins of allergic hives are well-known.

Allergic hives are usually triggered by:

  • Foods – such as peanuts, shellfish, eggs, milk, or food additives
  • Medications – antibiotics and pain reliefs like aspirin
  • Latex
  • Plants – grass and weeds like poison ivy, poison oak
  • Cockroaches and cockroach waste
  • Bites from insects
  • Animal dander
  • Water touching the skin
  • Some chemicals in detergents, body creams, and soaps.

What if your hives are serious?

Don’t panic! Usually, hives aren’t always serious. In fact, they affect about 1 in every 5 people globally.

However, if you’re vomiting, dizzy, and have difficulty breathing, you need to see your doctor. When these symptoms accompany the hives on your skin, it could mean something more serious, like anaphylaxis. Anaphylaxis could be life-threatening.

How to treat Hives

Luckily, you can treat most hive infections with over-the-counter antihistamines, especially if your hives are mild.

However, in extreme cases, your doctor will probably administer a combination of antihistamine and epinephrine. You can get your epinephrine in an EpiPen (epinephrine auto-injector). For more information about hives, treatment read this article.

Top tip: If you’ve noticed symptoms of anaphylaxis with your hives, make sure you always have your EpiPen around.

Sometimes, hives can disappear after some days and then re-appear after a few weeks. To prevent hives from worsening, you need to stay away from allergens that trigger hives. 

How to prevent Hives

  • Don’t scratch your skin. Itching makes hives spread faster.
  • If you experience hives after using harsh soaps, avoid using them. You can use mild soaps instead.
  • Wear sunscreen to protect yourself from the sunlight.
  • Wash your hand immediately after you play with your pets.
  • When you’re feeling itchy, apply a cold compress on the area of the hives.
  • If you’re sensitive to extreme cold, ensure you wear warm clothes.
  • The urge to itch can be unbearable. If your child can’t stop itching, I recommend playing a game or singing a song to distract him from scratching.

2. Allergic Reactions

Allergies are a common cause of itchy red bumps on the skin. From food to medicines to pollen, many different causes can cause allergies. According to the Centers for Disease Control (CDC), about 50 million Americans experience allergic reactions each year.

Food or medicine can cause urticaria, which is an itchy pink or red rash. It can appear in clusters or alone. In most cases, urticaria will disappear automatically within 1-2 days. But some chronic urticaria may last longer.

Urticaria can be treated with antihistamines or corticosteroids. However, if a serious condition such as angioedema, an urticaria-related swelling occurs deep in the skin, you need to consult your doctor immediately.

Sun allergy can cause an itchy red rash that some people experience after exposure to the sun. These small itchy red patches can cause skin redness, pain, and blisters. Sun allergies may be genetic or caused by drugs that make them more sensitive to the sun.

For mild sun allergies, the symptoms will disappear after a few days in the sun. You may need over-the-counter medications, prescription corticosteroid medications, or phototherapy to enhance the skin’s tolerance to the sun for severe cases.

3. Eczema

Get Rid of Eczema
Get Rid of Eczema

If you notice your skin is red, dry, scaly, and itchy, you may have eczema. Although eczema occurs very often in children, adults can have eczema too. It usually flares up on the elbows, hands, and feet. Luckily, it is not contagious.

While doctors haven’t pinpoint eczema’s exact cause, we know certain factors like allergens, stress, dry skin, excess climates, and other irritants can trigger eczema. Additionally, eczema makes you more vulnerable to other skin infections.

Naturally, eczema goes away on its own. But when it emerges, you may need to try several medications to get rid of the red, unpleasant itch. You can either apply topical medications to your skin or take them orally.

Medications you can take include.

  • Antibiotics
  • Antihistamines to reduce the itching
  • Corticosteroid cream or ointment to ease the itching
  • Apply a cold compress to control the itch.

Top tip: I recommend you avoid contact with substances that trigger the flare-ups of eczema on your skin.

4. Psoriasis

Psoriasis is a chronic infection that causes new skin cells to grow faster than usual. Since new skins are forming faster than you shed off dead skin, skin tends to build up and create thick red patches covered with white or silvery scales. While the patches may be itchy and burn, in extreme cases, psoriasis lumps can bleed too. Psoriasis usually occurs on the elbows, knees, scalp, and back.

Unfortunately, there’s no specific cure for psoriasis. It can flare up on the skin and go back into remission weeks after. However, many treatments can manage the symptoms. These treatments are usually administered orally, light therapy, as ointments on your skin, or intravenously.

Medications you can take to reduce psoriasis include;

5. Insect Bites and Stings

Aside from the pain that accompanies bug bites, their bites can also leave itchy red bumps on your skin. Although they can cause discomfort, most insect bites are usually harmless. Not all bites and stings are the same. For example, mosquito bites produce a small red, round, and puffy bump.

Bites from bed bugs are quite different. Compared to mosquitoes and spider bites, bites from bed bugs produce bigger rashes.

Other insects that can produce itchy red bumps on your skin include;

  • Fire Ants
  • Bees
  • Wasps
  • Fleas
  • Ticks
  • Head Lice

If you enjoy spending time outdoors, you’re likely to get a bit now and then. The good news is, most bites fade away in 7–14 days.

The signs of a bug bite show almost immediately. If you notice a bug bite on your skin, quickly wash the area with soap and water.

If the itching is unbearable, you can apply a cold compress to the bite mark. Alternatively, you can apply calamine lotion to relieve the itching.

Top tip: Prevention is always better than cure. If you wake up from sleep with bite marks, you may have a bedbug infestation. I recommend you remove all your beddings, clothes and treat the area with a repellent.

6. Scabies


Scabies is a skin disease caused by Sarcoptes scabiei var. hominis, which is a tiny mite. Mites are not easy to find as they can easily penetrate the skin. You may find a small scaly line with a small black spot at the end.

This is a highly contagious infection, and it is easily spread by sharing things such as towels, bedding, sheets, and clothing with others.

Scabies may cause some small red itchy bumps similar to acne and bug bites. Your skin may also be covered with scaly in the infected area. Blisters and pustules may appear on the palms and feet, accompanied by severe itching.

Using prescription drugs is an effective way to treat scabies. If you experience the above symptoms, please see your doctor immediately. And pay attention to personal hygiene and avoid spreading it to others.

7. Dermatitis

Dermatitis is a common chronic skin disease. It can cause blistering, oozing, or flaking off the skin and multiple itchy red bumps filled with pus. Sometimes there is a feeling of swelling, tingling, or burning. Fortunately, in most cases, dermatitis is not contagious.

Usually, it will appear on the back, knees, scalp, elbows, or the back of the neck. The main cause of dermatitis is unclear; it has many forms and may be caused by various things.

Common dermatitis includes contact dermatitis, dyshidrotic eczema, neurodermatitis, and nummular dermatitis. Contact dermatitis happens when your skin contact with an irritant or allergen.

The treatment of dermatitis depends on the cause, type, and severity of symptoms. Mild dermatitis can be treated with home remedies.

First, clean the skin thoroughly with warm soapy water, mix 1 tablespoon of baking soda with 2 tablespoons of water to form a paste, and apply it to the skin.

Wait for 10-15 minutes and rinse with water. This method can effectively reduce itching and allergic reaction.

If the symptoms are more serious, you need to see a doctor. Doctors can use drugs such as antihistamines such as diphenhydramine (Benadryl) to reduce allergies and itching.

How to prevent dermatitis

  • Try to avoid scratching, which will aggravate the symptoms and spread the bacteria to other parts of your body.
  • Try to use neutral soap and bathe in warm water instead of hot water to prevent dry skin.
  • Apply water-based moisturizer or oil-based moisturizer on the skin after bathing.

8. Rosacea


Rosacea is a chronic skin condition that affects the face. Usually, when you have Rosacea, you look like you’re always blushing. Your blood vessels become visible through your skin, and it appears flushed. Rosacea also comes with a burning sensation and a swollen, bulb-shaped nose. In addition, you may feel itchy or stinging frequently, as rosacea can cause your face more sensitive.

Unfortunately, Rosacea has no known cure. However, many searches found that rosacea usually is triggered by specific ingredients or lifestyle habits. These factors include drinking alcohol, heat, sweating, sun exposure, eating spicy foods, contact preservatives or fragrances.

Luckily, some over-the-counter medications could help relieve the symptoms. You can use creams that mask the red patches. You’d better seek your dermatologist when you notice rosacea on your face.

Top tip: Rosacea looks a lot like acne, so they can be very difficult to differentiate. However, standard acne treatment methods don’t work for Rosacea.

9. Fifth’s Disease (Slapped cheek syndrome)

Fifth’s Disease is a viral disease caused by parvovirus B19, and it comes with a mild red rash. It usually affects the legs, arms, and cheeks (From its name).

Asides from the red rash, you may experience headaches, sore throat, and a runny nose.

Unfortunately, the rash may take several days before it appears. When it does, the rash emerges as blotchy red papules on the cheeks. In some cases, the rashes become more pronounced when you are exposed to the sun.

Luckily, if you have a strong immune system, treatment isn’t necessary. You can wait for the red rash to fade away. It usually takes about 1-3 weeks. Your doctor may also prescribe over-the-counter Tylenol to ease the symptoms.

10. Hay Fever (Allergic Rhinitis) 

how to get rid of a stuffy nose
how to get rid of a hay fever

Hay fever is prevalent in the United States. In fact, it affects about 18 million Americans per year. It usually develops when you come in direct contact with pollen from trees, weeds, grasses, and dust.

The symptoms usually include a runny nose, sneezing, coughing, watery eyes, and red, inflamed skin rash. You start noticing the symptoms immediately after you encounter an allergen. Unfortunately, the rash will persist as long as you remain exposed to the allergen.

If your symptoms aren’t too severe, over-the-counter medications like antihistamines can work. However, in severe cases, you need to treat the symptoms of Hay fever with allergy shots.

Top tip: I recommend you avoid contact with pollen, especially during the pollen season.

11. Keratosis pilaris

Keratosis pilaris, also known as “chicken skin,” is a common skin condition. This is caused by a buildup of keratin(a hard protein) that helps protect the skin from harmful substances and infection.

Keratosis pilaris usually occurs when the buildup blocks the opening of a hair follicle. It can cause dry, rough patches and tiny bumps that usually appear on the cheeks, buttocks, thighs, or upper arms. Depending on your skin tone, the tiny bumps can be brown or reddish.

Keratosis pilaris is a harmless skin condition that isn’t usually hurt or itchy. But it also can be itchy and uncomfortable when the skin gets irritated or too dry. Normally, Keratosis pilaris is considered a variant of normal skin that does not need to treat. In addition, doctors do not know exactly why keratin builds up now. It may be associated with some genetic diseases or other skin conditions, and it usually disappears by age 30.

However, you can reduce the appearance of the bumps with moisturizers and prescription creams. In addition, some products containing exfoliating ingredients like lactic acid or urea can also help improve the appearance of the skin.

Top tip: Make sure to keep the skin moisturized as dry skin tends to worsen this condition.

12. Folliculitis


Folliculitis is a common skin condition that can cause small red itchy bumps—this inflammation of the hair follicle caused by a bacterial, chemical, drug, or fungal infection.

Infection of hair follicles from Staphylococcus aureus (staph) bacteria is the most common cause of Folliculitis. Folliculitis can occur everywhere on your body that has hair. But it is most common on the buttocks, legs, arms, back, and beard area.

Folliculitis can cause swelling, Pus-filled blisters, small red bumps, or white-headed pimples around the hair follicle. The infection can spread and turn into a large swollen bump or crusty sores. You may feel Itchy, pain, tenderness, or burning skin. Sometimes, severe infections can lead to scarring and permanent hair loss.

How to treat and prevent folliculitis? You can try these tips:

  • Wash your skin often with warm water and antibacterial soap.
  • Before shaving, smooth the embedded hair with a towel and apply a lot of shaving lotion. Use a sharp blade and rinse with warm water; apply moisturizing lotion after shaving.
  • Try to reduce the number of shavings and avoid sharing razors and towels.
  • Use hair removal products to reduce skin irritation and always shave in the direction of hair growth.
  • Wear loose clothing and wash clothes with antibacterial soap after each use.
  • Try to use a clean heated swimming pool or bathtub, clean regularly, and add chlorine as recommended.
  • If folliculitis is severe, consult your doctor as soon as possible.

Home Remedies to Treat Itchy Red Bumps on Your Skin

Some itchy red bumps stay for a short time; some others tend to stay for longer periods. In fact, some skin infections can last a lifetime.

While most rashes can be treated with over-the-counter products like antihistamines and hydrocortisone creams, simple home remedies can relieve symptoms and clear up the unsightly rashes in no time.

When you get a nasty skin rash, here are some remedies you can try out.

  • Apply a cold compress on the region of the infection will help reduce the swelling and the urge to itch.
  • Using a good moisturizer will prevent your skin from breaking. Apply your moisturizer twice a day immediately after you take your bath.
  • Apply hydrocortisone, calamine lotion, or any other anti-itch cream to reduce the urge to itch. Most topical creams are readily available in drug stores or pharmacies.
  • If you have sensitive skin, using harsh soaps and detergents could worsen the itchy skin. Instead, use skin-sensitive soaps or unscented detergents.
  • Avoid scratching. The itch can be intolerable most times. However, scratching your rash can damage your skin or spread it from one area of your body to another. When you feel itchy, you can distract yourself by exercising or playing a game.
  • If your body reacts to extreme temperatures, you can take a lukewarm bath to avoid triggering a rash.
  • Avoid substances that irritate your skin.

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