Low-Grade Fever: 12 Common Causes with Treatment

What is Low-Grade fever and how to relieve the fever? Fever is a symptom of a health condition when the body temperature increases above the normal, it usually caused by an infection. Fever is the body’s natural defense against infection. A person’s average temperature can be a little higher or lower than the average 37 C temperature.

A child has a fever if the body temperature is or at 37.2 degrees Celsius (100 degrees Fahrenheit) in the armpit, 37.5 degrees Celsius (99.5 degrees Fahrenheit) orally, or 38 degrees Celsius (100.4 degrees Fahrenheit) rectally.  An adult usually has a fever when the body temperature reaches or exceeds 37.8 degrees Celsius (100 degrees Fahrenheit).

Low-Grade Fever
Low-Grade Fever Causes and Treatment

What is Low-Grade Fever

A low-grade fever is a mild increase in the body temperature above normal that does not exceed 38.5-degree centigrade. The temperature may vary according to the site of measurement. The temperature of the body can also increase due to heavy clothing, physical activities, or hot temperature.

When there are no other signs or symptoms involved, low-grade fevers can be treated by getting enough rest and drinking plenty of water. Taking medicine like ibuprofen, acetaminophen, or aspirin can lower the body temperature, but not recommended for children or infants. Persistent fever may require medical attention, especially if accompanied by other symptoms such as a cough and sore throat.

A low-grade fever may follow after vaccination, during teething, a sign of inflammatory or autoimmune conditions, side effects of certain medications, or it can be a symptom of severe health condition. If the fever is accompanied by severe symptoms, such as irritability, confusion, breathing problems, severe pain, increased heart rate, seek medical help right away.

Symptoms of Low-Grade Fever

The symptoms of low-grade fever vary according to the disease or health condition. Some conditions can affect the body’s temperature. These are the infection symptoms that you may experience with low-grade fever:

  • Fatigue
  • Burning sensation when urinating
  • Abdominal pain or cramps
  • Nausea with vomiting, sometimes without
  • Muscle ache, joint pain
  • A headache or an earache
  • Rashes or redness of the skin
  • A sore throat or shortness of breath
  • Diarrhea

Other symptoms include decreased appetite, feeling hot, swollen lymph nodes, and reduced range of motion of the joints, bruises, and ear pulling.

12 Common Causes of Low-Grade Fever

These are the most common causes of low-grade fever.

1. Bacterial Infection

Bacterial Infection

Infectious bacteria can make you ill as they produce toxins that damage the tissue. Some examples of bacteria that can lead to infection are E. coli, Streptococcus, and Staphylococcus, and the usual treatment for bacterial infection are taking antibiotics. Cases of bacterial infection are:

  • Strep throat – a bacterial infection that causes pain or inflammation in the throat. This condition, which is caused by group A streptococcus bacteria, can affect not only children but also adults. The symptoms may include coughing and sneezing.
  • Scarlet fever – this is also another kind of infection. People who have strep throat can develop scarlet fever. The symptoms of this condition are scarlet-colored rashes, fever, and sore throat.

2. Viral Infection

A viral infection is an illness or disease caused by a virus. This occurs when a virus penetrates the body through eating contaminated food, breathing polluted air, having sexual contact with someone with the virus, or an insect bite. There are vaccines available to prevent these infections, such as shingles, chickenpox, hepatitis A, hepatitis B, HPV, influenza, mumps, and measles.

The typical symptoms of viral infection include:

  • Fever, chills, flu-like symptoms
  • Fatigue, headache, nausea, vomiting
  • Rash, sore throat, ear pain
  • Body pain, abdominal pain, stiff neck
  • Weight loss
  • Diarrhea
  • For infants, some signs of viral infection are excessing crying, hard to feed, excessive sleepiness, and a bulging spot on top of the head

If you have symptoms of viral infection, seek professional medical advice before taking any treatments. There are other types of viral diseases, such as HPV, that require more medical attention as it can lead to a severe health condition.

3. Lung Infections

Lung Problems

The symptoms of lung infection include fever, shortness of breath, chronic cough, chest pain, and changes in mucus.

  • Bronchitis – an inflammation of the lining of the bronchial tubes. Patients with bronchitis cough up thick mucus. This condition may develop from a respiratory infection or cold. Signs and symptoms of acute or chronic bronchitis include a cough, phlegm, shortness of breath, chest discomfort, fever and chills, and fatigue.
  • Tuberculosis – is a severe disease caused by bacteria, which can be spread from one person to another. Signs and symptoms of tuberculosis include fever, chills, loss of appetite, coughing up blood, chest pain, a cough that lasts for three weeks, weight loss, and night sweats. This condition can affect other parts of the body, and medical attention is needed as soon as possible.
  • Pneumonia – is an infection that causes air sacs inflammation in the lungs. The air sacs may fill with purulent material or fluid that results to cough with phlegm, fever, chills. Other symptoms include shortness of breath, confusion, lower body temperature for elders, diarrhea, nausea, and vomiting. Bacteria, fungi, or viruses can cause pneumonia. See a doctor immediately if you are experiencing chest pain, persistent cough and fever, and difficulty breathing.

4. Ear Infection

An ear infection is one of the most common viral or bacterial infections, which affects the middle ear. Children and adults with an ear infection may experience ear pain when lying down, fever, headache, loss of appetite, hearing and sleeping problems, irritation, and ear drainage.

If you are experiencing ear discharge, see your doctor immediately. For children, observe your child’s ear and visit the doctor if the symptoms last for more than one day if there is fluid discharge, severe ear pain, and irritation.

Read: Top 10 Home Remedies to Get Rid of Earwax Naturally

5. Gastroenteritis

Gastrointestinal

Gastroenteritis is the inflammation and irritation of the intestines and stomach which is usually caused by a bacterial or viral infection. The most common symptoms of this condition include diarrhea, vomiting, stomach pain, fever, nausea, headache, and cramping. Due to vomiting and diarrhea, this situation can also lead to dehydration. You may experience dizziness, extreme thirst, dry mouth, and skin.

There are many ways to acquire gastroenteritis, such as consuming contaminated food or water, contact with a person who has a virus, or not washing hands after using the bathroom. If you experience the signs of dehydration or food poisoning, seek medical help immediately.

Read:16 Best Ways to Get Rid of Gas and Bloating Fast

6. Urinary Tract Infection

Urinary Tract Infection

Urinary tract infection is an infection in an area of the urinary system, such as the ureters, kidneys, bladder, and urethra. Women have a higher risk of developing UTI than men. Severe cases of UTI can spread to the kidneys. Some signs and symptoms of UTI include:

  • Persistent need to urinate, but small amounts
  • Burning sensation when urinating
  • Cloudy urine
  • Foul or strong-smelling urine
  • Pelvic pain for women
  • Red or bright pink urine

If you have signs and symptoms of UTI, contact your doctor immediately. Your doctor may recommend antibiotics. If there is no improvement after taking the medications, be sure to revisit your doctor.

7. Sinusitis

Sinusitis is the swelling or inflammation of the sinuses. When blocked or filled with mucus or fluid, germs can grow and result in a sinus infection. The most common causes of sinusitis include cold, allergic rhinitis, nasal polyps, or the small growths in the lining of the nose, deviated septum, and low immune system.

For uncomplicated sinusitis, your doctor may recommend saline nasal washes and decongestants. Just make sure not to use an over-the-counter decongestant for more than three days as it can make your condition worse. Moist and warm air can help alleviate the symptoms of chronic sinusitis. Inhaling steam from warm water and vaporizer is also helpful to improve your breathing.

Read:10 Simple Tips to Get Rid of a Sinus Infection Naturally

8. Dengue Fever

Dengue Fever

Dengue is a serious public threat in tropical or warm areas of the world. Complications of this disease can lead to a more severe problem or death. Mosquitoes carry a dengue virus when they bite a person who takes the virus. The virus enters the bloodstream and spreads throughout the body. The symptoms of this condition include

  • Sudden fever
  • Nausea, headache
  • Fatigue
  • Joint and bone pain.
  • Rashes
  • Mild bleeding (bleeding gums, nosebleed)

If you think you develop symptoms of dengue, see your doctor immediately. There is no vaccine to stop dengue fever. The only way to prevent this disease is by avoiding the bites of mosquitoes, especially if you are living in warm or tropical countries.

9. Medications

Some medications can cause a short-term low-grade fever when used, which is also called drug fever.

Common drugs that cause drug fever include cephalosporin, penicillin, phenytoin, quinidine, procainamide, and so on. If fever occurs, you can contact your doctor to adjust your dose or use other medications.

10. Autoimmune disease

Autoimmune diseases are caused by the immune system’s immunity to the components of the body. Usually, the immune system only reacts to foreign objects that invade the body, such as bacteria, viruses, parasites, and transplants. In some cases, the body’s immune system itself is abnormal. This can cause the immune system to mistake its components for foreign objects to attack.

Certain chronic autoimmune diseases such as rheumatoid arthritis can cause a low-grade fever. If it is not controlled effectively, the consequences are very serious and even life-threatening.

11. Thyroid issues

Thyroid problems such as subacute thyroiditis can also cause a low-grade fever. Thyroiditis is usually caused by infection, trauma, autoimmune disease, or drugs. Other symptoms include fatigue, muscle pain, goiter, neck pain often spreads to the ears.

12. Leukemia or lymphatic cancer

Leukemia or lymphatic cancer can cause a persistent and unexplainable low-grade fever. Other symptoms include swollen lymph nodes, night sweats, loss of appetite, bone and joint pain, headaches, and unexplained weight loss. If the above symptoms occur, you need to seek medical help immediately.

Causes of Low-Grade Fever in Children

Low-grade fever in infants and children is a common condition. It usually refers to oral readings of 99.5 degrees Fahrenheit to 101 degrees Fahrenheit or rectal readings of 100.4 degrees Fahrenheit to 100.9 degrees Fahrenheit.

Babies and children are more susceptible to bacterial or viral infections due to their weaker immune systems. Influenza and the common cold are the most common causes of low-grade fever. However, in some cases, it may also be caused by other diseases. These common causes include:

  • Upper respiratory tract infection: This can cause cold symptoms such as cough, nasal congestion, and sore throat. A cough may also indicate a strep throat or sinus infection.
  • Gastrointestinal infections: This can cause infants to vomit, diarrhea, and fever.
  • Urinary tract infection: You will find cloudy urine or a strong smell of urine.
  • Chickenpox: Chickenpox is caused by a virus and can also cause fever. You will find blisters on your child’s skin.
  • Mumps: This is caused by a virus infecting the salivary glands, which can cause fever and swelling of the salivary glands.
  • Dengue fever: This is an acute infectious disease caused by the transmission of the dengue virus through mosquito vectors. Dengue fever can cause headaches, severe aches and pains in muscles, bones, and joints, swollen lymph nodes, and persistent low-grade fever.
  • Allergic reactions: Severe allergic reactions can also cause low-grade fever, vomiting, and diarrhea.
  • Teething: The body temperature of a child will rise when teething, and the symptoms will disappear automatically after a while.
  • Measles: Measles is one of the most common acute respiratory diseases in children and it is highly contagious. This can cause fever, conjunctivitis, and red spots on the skin.

If low-grade fever in babies and children persists, you should contact your doctor immediately.

When to See Your Doctor?

There are some cases that low-grade fever may be a symptom of a severe condition and should be diagnosed immediately by an expert. If you are experiencing these symptoms, seek medical attention immediately:

  • Rapid heart rate
  • Respiratory or breathing problems, such as wheezing, shortness of breath
  • Severe pain
  • Vomiting blood or blood in the stool
  • Chest pain, tightness, or palpitation
  • Seizure
  • Confusion, hallucinations, delusion

Conclusion

Depending on one’s health condition, low-grade fever can be a sign of cancer, pancreatitis, meningitis, encephalitis, hepatitis, heatstroke, brain damage, or bone infection. If you feel severe chest pain, rapid heartbeat, Confusion, blood in the stool and other serious conditions, seek medical help immediately.

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