Cramp pain in the right rib cage after each push-up may be associated with inadequate warm-up, electrolyte disorders, muscle fatigue, which is an abnormal situation. 1. Inadequate warm-up: If you don’t warm up sufficiently before doing push-ups, the stretch and elasticity of your muscles are not improved in advance, and doing push-ups right away may lead to uncoordinated contraction of the local muscles, resulting in muscle cramps and pain. 2. Electrolyte disorders: If doing push-ups leads to a lot of sweating, it will lead to the loss of sodium, potassium, calcium, magnesium and other electrolytes, which will cause electrolyte disorders, thus leading to the phenomenon of muscle cramps and pain. 3. Muscle fatigue: If you do not do push-ups gradually increase the amount of exercise, but more than suitable for their own intensity, it will lead to muscle fatigue and the phenomenon of cramps and pain. If you have cramps and pain in your right rib cage after each push-up, you should go to the hospital in time to find out the cause and the doctor will issue individualized treatment plan according to the situation.