There are many reasons for pain when the chest is touched: 1, heart problems, if usually nothing, appear when staying up late, tired or excited, may be sinus arrhythmia, if there is a history of underlying disease, genetic disease, promptly go to the hospital for cardiac ultrasound examination. 2, chest surface skin allergy, can be accompanied by skin itching, blisters, red rash, promptly seek medical attention to prevent more serious respiratory manifestations. 3, intercostal neuritis, common in Women, mostly appear in the case of exertion, weight bearing or excessive exercise, need to take more rest, take anti-inflammatory and pain-relieving drugs. 4, breast hyperplasia, the disease is related to fluctuations in the body’s hormone levels, linked to the menstrual cycle, with the arrival of the menstrual period and pain, the menstrual cycle leaves and disappears, will be accompanied by the production of breast nodules.