The way to reduce swelling of wasp stings needs to be decided according to the location and severity of the stings, etc. Different patients have different conditions, and there is no such thing as the fastest method. Usually, methods suitable for the patient’s condition are chosen, such as general treatment, medication (loratadine, etc.) and physiotherapy (cold compresses, etc.). 1. General treatment: After being stung by a wasp, it is necessary to remove the stinger from the wound as soon as possible, and the wound can be washed thoroughly in time to neutralize the toxin, and for those with swollen limbs, the affected limbs can be elevated to promote swelling. If necessary, a professional doctor should remove the stinger and treat the wound. 2. Medication: Swelling caused by wasp stings can be treated with antihistamines such as loratadine as prescribed by the doctor, and magnesium sulphate can be given as a hot and wet compress if necessary to promote swelling. 3. Physiotherapy: early can give local cold compresses, not only can reduce the pain, but also to avoid aggravation of edema. After 48 hours, local hot compresses can be given to promote local blood circulation, which is conducive to swelling. It is recommended that patients seek timely medical treatment, improve the examination, and be given appropriate treatment by professional physicians to avoid delays in the condition.