Swelling of the right palm may be caused by allergy, peripheral neuritis, tenosynovitis, trauma and other factors. 1. Allergy: Skin allergy in the right palm can cause localized skin swelling in the right palm, which may also be accompanied by flushing and itching of the skin. 2. Peripheral neuritis: prolonged exposure to chemicals or cold water in the right hand can cause inflammation of the peripheral nerves in the right hand, which may lead to swelling of the right palm. 3. Tenosynovitis: If the right hand is frequently active or long-term strain, causing injury to tendons and tendon sheaths, it may lead to aseptic inflammation of the right palm, resulting in localized swelling and pain in the right palm. 4. Trauma: If the right palm is hit by external force, causing soft tissue or bone injury, subcutaneous hematoma, etc., it will also cause swelling of the right palm, accompanied by symptoms of pain. Swelling of the right palm should be clarified under the guidance of a doctor to determine the cause of the disease and reasonable treatment.