1. A Fever
A doctor will first test for a temperature when they suspect an immune response, infection or illness. A fever is a sign that your body has reacted to an external or internal threat.
A fever can indicate that your body is getting ready to defend itself against a perceived danger. In some cases, this may be due to the body’s immune system attacking healthy cells as well as other cells.If your fever doesn’t disappear, it could be a sign of an infection or chronic condition.
A fever, when combined with any other symptoms listed here, could indicate that you have tuberculosis. You should be tested as soon as possible.
