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Fever and weakness can be caused by viral or bacterial infections, and even a low-grade fever can indicate an infection. Antibiotics are ineffective against viral illnesses, but bacterial infections can be treated with antibiotics. Fever-lowering medications may be necessary depending on the severity of the fever and the person’s health. Rest and drinking fluids can help treat mild illnesses.
Fever and weakness are usually caused by an infection or disease in the body. Common illnesses that lead to fever and weakness include the flu and chicken pox, among others. Viral or bacterial illnesses can cause fever and make you feel weak; moreover, any infection, even a small one, can cause fever. This means that a low-grade fever can be indicative of an infection, even if you are unaware of an infection in the body. Because these symptoms are so common, a doctor may need to do a blood test or throat swab to determine what type of disease is present.
In most cases, there is no treatment for a viral illness that causes fever and weakness. Antibiotics are ineffective against viral illnesses, although it may be a good idea to see a doctor anyway to be sure that the cause of the fever is not something serious. Typically, a virus causes a lower grade fever than a bacterial infection, but this is not always the case. A fever shouldn’t last more than a few days, and rest and drinking plenty of fluids is usually an effective treatment for mild illnesses.
A bacterial infection that causes fever and weakness can usually be treated with antibiotics. Again, virtually any infection can cause a fever; it’s also possible for any infection to spread quickly, so you need to keep an eye on it and visit a doctor if it gets worse. If you have an infection from a cut on your skin, for example, and you have a fever and weakness, it’s a good idea to visit a doctor. Also, any skin infection with red streaks that peel off has entered the bloodstream, which can cause septic shock and death; you should get emergency treatment and intravenous antibiotics right away.
Experts are occasionally divided on whether to take fever-lowering medications. If the fever is high or the person with the fever is elderly or very young, medicines to reduce the fever should be given. On the other hand, if it is a relatively low fever and the person is in good health, it may be best to let the fever run its course; a fever is the body’s way of fighting an infection, and it can actually be helpful. Fever naturally causes fatigue and weakness, so if you can get some rest until you recover, this may often be the best method of treatment.
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