If a shrimp stubs its hand and swells, immediate medical attention is recommended for disinfection, debridement, and medication. 1. Disinfection: If the swelling is not deep and extensive, and the skin does not show signs of pus, it can be disinfected with iodine povidone and evaluated by a physician to see if a tetanus shot is needed. 2. Cleansing: Swelling of the hand indicates the presence of toxic or dirty substances from the shrimp spines in the wound, leading to infection. It is necessary to incise the wound, disinfect it and then thoroughly clean it, remove the necrotic material, rinse it with 3% hydrogen peroxide and saline, insert gauze into the wound to drain pus secretion, and change the dressing regularly. 3. Medication: Amoxicillin, cefaclor and other antibiotics can be taken as prescribed by the doctor to prevent and control infection. The above treatment should be carried out by a professional doctor in a hospital.