The symptoms of body aches and pains after waking up in the morning may be due to the following reasons: 1. Excessive exercise or labor in the previous days may lead to excessive accumulation of lactic acid in the body’s muscle tissues, and too much lactic acid will lead to muscle aches and pains. If the bed you sleep on is too soft, the muscles and ligaments between the joints will be stretched because of the deformation of the spine when you lie on it, and the quality of sleep is better. And physical activity becomes less will let the body on the many soft tissue damage, the morning after the body will appear sore symptoms.