There are three main reasons for morning body aches and pains: First, because of the high activity during the day before going to bed, resulting in muscle tissues being under tension, fatigue, and strain, it is easy to produce more lactic acid and inflammatory metabolites locally, and the accumulation of metabolites is not obvious during the activity because the blood circulation is better, but the blood circulation slows down at night during the sleep state, leading to an increase in the accumulation of metabolites. The inflammatory metabolites will stimulate the peripheral nerves and cause pain, and the lactic acid and other metabolites will cause the body to become sore and weak. Secondly, due to the situation of cold at night, once there is cold, muscle tissue becomes tense and blood circulation decreases, which will lead to the formation of local metabolites accumulation, and the symptoms of soreness. Third, due to viral infections and influenza virus infections, local viruses and viral metabolites will stimulate the peripheral nerves of the whole body, which will also easily cause symptoms of soreness and pain.