The most common causes of headache and body aches are the following: First, inflammatory problems, such as upper respiratory tract infections or infections in other parts of the body, are considered to cause fever, headache and body aches. In this case, it is recommended to measure the body temperature and have blood tests to see whether it is caused by viral or bacterial infections, and to provide symptomatic treatment for viruses and bacteria to relieve the symptoms. Second, it is considered to be neurovascular headache, which may be triggered by overexertion or heavy exercise. After overexertion, it will induce too much lactic acid production in the body, and the body will experience aches and pains.