Sudden chest cramps that return after a while may be related to gas, or may be caused by angina pectoris or cardiac neurosis. 1. Failure to breathe: usually occurring just after eating a full meal, if a short period of time to carry out strenuous running and jumping activities, it may cause failure to breathe, which may appear in the chest suddenly cramps, and then recovered after a while. This is a normal physiological phenomenon, without special treatment. 2. Angina pectoris: During an attack of angina pectoris, due to the increase of myocardial oxygen consumption, resulting in insufficient blood supply to the myocardium, which may cause sudden chest cramps, and then recover after a while, especially in the case of over-exertion, mental and emotional tension and excitement, etc., which is more likely to occur. 3. Cardiac neurosis: usually caused by nerve dysfunction or mental and psychological problems, when cardiac neurosis attacks, it may cause sudden chest cramps, which will return after a while, and may be accompanied by palpitations, dyspnea and other symptoms. Sudden chest cramps that return after a while may also be caused by other reasons. If the symptoms recur frequently, consult a doctor as soon as possible to diagnose the cause and provide targeted treatment.