Wake up in the middle of the chest bone pain, mainly caused by the following reasons: 1, the location of the bone muscle, fascia and other soft tissue attached, such as pectoralis major muscle, pectoralis minor muscle, before sleeping due to lifting, lifting heavy objects when the force is too large can lead to pectoralis major muscle, pectoralis minor muscle muscle muscle tissue strain and strain injury, will be in the formation of inflammation foci as well as edema in the local, daytime activities due to the blood circulation is relatively fast, the inflammation and lactic acid and other metabolic products can be timely and effective metabolism, so it is not easy to appear in this position pain. During daytime activities, due to faster blood circulation, the inflammation and metabolites such as lactic acid can be metabolized in time and effectively, so it is not easy to have pain in this position, but after sleeping, the blood circulation slows down, and the inflammation builds up to stimulate the peripheral nerves around the pain, especially after waking up, and the pain will be more pronounced; 2, at night, when you sleep on your side for a long time and the upper limbs above are in the forward flexion and inward contraction, which causes compression and stimulation of the pectoralis major and minor muscles, which can result in long term muscle tissue damage. Produce compression stimulation, long time muscle tissue will appear excessive fatigue, if there is a cold at night, it will lead to muscle tissue becomes more tense, blood circulation slows down, inflammation buildup, will wake up in this position after the obvious pain.