It's your action that's wrong. Practicing dumbbells is mainly to exercise arm strength. Generally, when you practice biceps brachii, you are bent. The wrist hurts because the strength is wrong. Pay attention to control your wrist when you bend over. Do not use wrist strength to complete the action, but use biceps brachii contraction to do centripetal movement. Fix your wrist! Method: You can bend over with a wristband, and move your wrist, elbow and shoulder before doing the action! You are left-handed, so your left arm can complete the action without wrist force, and your right hand is not strong enough, so you need wrist force, which leads to movement deformation and pain in your right wrist! ! Pay attention to relax after finishing a set of actions.