Mouth ulcers are generally not recommended to be punctured with a needle. 1. In the occurrence of mouth ulcers, it is generally not recommended to use a needle to puncture. Because on the surface of the mouth ulcer, usually will form a false membrane, can come to protect the ulcer surface from cold, hot, sour, sweet, as well as spicy and irritating food, in order to ensure that the mucous membrane of the deep tissue of the ulcer is normal. 2. At the same time, the degree of sterilization of the needle is not guaranteed. If it pierces the surface of the mouth ulcer, it may cause obvious bleeding and pain. In severe cases, it may cause infection, aggravate the ulcer surface and increase the pain level even more, as well as delay the healing of the mouth ulcer. If mouth ulcers, try to avoid using the needle to puncture, should go to the regular doctor in time, by professional doctors to take corresponding treatment measures.