Boys chest pain when pressed may be physiological reasons, may also be trauma, chest wall disease, breast disease, etc. caused. 1. Physiological reasons: the accumulation of lactic acid in the pectoral muscle caused by strenuous exercise, or local muscle tension caused by incorrect sleeping posture, etc., the patient may have chest pain when pressed. 2. Trauma: due to bone injury, muscle strain and intercostal nerve injury caused by trauma or strenuous exercise, patients may have chest pain when pressed. 3. Chest wall diseases: chest wall fasciitis, intercostal neuritis, rib osteochondritis and rib tumors and other bone tissue diseases, patients can have chest pain when pressed. 4. Breast diseases: due to diet, emotion, drugs and other factors lead to hormone level disorders in the body, resulting in breast hyperplasia or inflammation, patients can appear chest pain when pressed, men can also appear breast disease. Men’s chest pain when pressed may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, give targeted treatment or treatment.