The flu (influenza) is a viral infection that assaults your respiratory system as well as your throat, nose, bronchial tubes and lungs. Healthy individuals as well as the elderly, young children and those with weak immune systems can contract the flu, though the outcome may be different. An otherwise healthy person might be ill for days, though he will generally get over the flu quickly. For those with compromised immune systems, however, the flu can be fatal.
Acute Cold-like Symptoms
Cold symptoms can typically take days to develop, beginning with a sniffle or sore throat and gradually worsening. The flu, however, is sudden and can make you feel ill quickly. Nasal congestion, headache and a dry cough are commonly experienced with the flu.
Fever
A fever of over 101 degrees Fahrenheit (38 degrees Celsius) in adults or as high as 103 F to 105 F (39.5 C to 40.5 C) in children may indicate the flu, according to the Mayo Clinic. For children, a fever of more than 102 degrees Fahrenheit (38.9 C) may require medication to bring the fever down, according to Kids Health. Common medications to reduce fevers are acetaminophen and ibuprofen, which work to block certain fever-causing chemicals in the brain. Both medications can be found in adult and children's formulas over-the-counter.
Fatigue and Weakness
Fatigue and weakness are other common symptoms of the flu. Most people who have had the flu recall camping out on the couch or in the bedroom for days until the flu passed.
Diarrhea and Vomiting in Children
Children who become ill with the flu may have diarrhea and vomiting. These symptoms can be dangerous as they can lead to dehydration. In addition, a high fever can cause you to lose fluids as you sweat, increasing the loss. Dry lips and mouth or decreased urination can be indicators of dehydration as well. If you think your child is dehydrated, offer small sips of water or broth and Popsicles to help increase fluids.
Muscle Aches and Pain
You may feel achy and have pain in the back, arms and legs. If these symptoms become severe, consider a pain reliever. An over-the-counter pain reliever such as Tylenol, Advil or Motrin might help. Some medications can cause stomach discomfort when taken on an empty stomach but can be taken with small amounts of food to reduce such irritation.
