There are many reasons for body aches and pains, and the common ones are as follows. First of all, it may be due to excessive lactic acid secretion in the body caused by excessive exercise, which is not able to dissipate quickly and accumulates in the body in large quantities, and then there will be body aches and pains. If it is caused by over-exercise, it can be relieved by proper rest. Secondly, it may be caused by tumor metastasis. If the tumor metastasizes through the blood, the symptoms of body aches and pains will appear, and it will be accompanied by fatigue and weakness. It may also be caused by cold and fever. Cold and fever will cause the immunity of human body to deteriorate and the body functions to become abnormal, thus causing the symptoms of aches and pains. The symptoms of body aches and pains must be taken seriously and treated as soon as possible, otherwise it will have a great impact on daily life.