The flu, or Influenza, is a virus that infects your respiratory passages, including your nose, throat and lungs. According to the Mayo Clinic, you are less likely to have complications from the flu if you are generally healthy. However, you are at the highest risk if you are over 50, have a chronic disease, a weakened immune system, are a health care worker or will be pregnant during flu season. You should be aware of associated chronic-low-grade flu symptoms if you are infected with the flu virus.
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According to the Mayo Clinic, fever (body temperature greater than 101 degrees F) is a chronic low-grade flu symptom. Fever occurs because your body attempts to defend itself against the flu virus by increasing its temperature. Therefore, a fever is often best left untreated. The Mayo Clinic states that you should not be too concerned about a fever unless it reaches 103 degree F. Call your doctor if your fever has not resolved over a few days or is above 103 degrees F.
Headache is a chronic low-grade flu symptom, according to the Mayo Clinic. This most likely occurs because of dehydration associated with a high fever or because of nasal congestion. Thus, it is important to drink plenty of fluids if you have the flu. Staying hydrated will help control your fever and loosen nasal mucus. Alert your doctor if your headache becomes severe at any point.
The Mayo Clinic states that body aches in your back, arms and legs are common chronic low-grade flu symptoms. Over-the-counter pain-relieving medications may be used if your body pain becomes intolerable. These aches should resolve over the course of the illness. However, consult your doctor if your body aches get worse or do not improve.