How long does it take for a plaster to burn to hurt, mainly related to the plaster composition and the cause of the pain, can not be generalized. If the patient feels local burning pain after applying the plaster, which is manifested as a relatively mild burning sensation, it is mostly due to the reaction caused by the dilation of skin capillaries due to the action of the blood activating and stasis-transforming ingredients in the plaster, which usually does not require special treatment and continues to be observed, and can generally be relieved in 24 hours. If the burning sensation continues to worsen and there are obvious local symptoms such as redness, swelling, itching, oozing and rash, the possibility of skin allergic reaction should be considered. It is recommended to stop using it immediately, keep the local skin clean and dry, avoid scratching, and oral anti-allergy medication is needed for particularly severe symptoms. The specific duration of pain depends on the patient’s treatment and varies from person to person. In conclusion, patients with burning pain after plastering are recommended to go to the orthopedic department of a regular hospital in a timely manner, to be examined by a professional doctor to clarify the cause and then to carry out symptomatic treatment, and not to deal with it on their own.