Unexplained body aches and pains may be due to influenza, osteoporosis, seizures, somatization disorder, etc. 1. Influenza: viral infection that causes body aches and pains, often accompanied by respiratory symptoms such as fever and runny nose. 2. Osteoporosis: Most common in premature menopausal women or the elderly, often manifested by unexplained bone pain, and some people may have pathologic fractures. 3. Epileptic seizure: some patients with epileptic seizure cannot recall the experience after the seizure, but because of the muscle damage caused by convulsions and so on, they may also have pain all over the body. 5. Somatization disorder: this is a group of psychiatric disorders characterized by the persistence of somatic symptoms, and some patients may present with muscle fiber pain. There are many reasons for unexplained pain all over the body, so you can go to the relevant departments for a clear diagnosis with relevant examinations.