When a leech has got into the body, generally speaking, the following treatment methods are often available: i. Since the leech is accompanied by suction cups around the mouth, it can be adsorbed on the skin and mucous membrane of the human body and play a stronger fixation role. If the patient forcibly pulls out the leech, it may cause the leech to break and remain in the organism to cause more serious infection. At this time, you can gently pat the muscles and skin around the leech to play the effect of loosening the suction cup of the leech, and part of the leech can come out by itself. Secondly, if the leech has completely drilled into the body, at this time, high sugar, hypertonic saline and vinegar can be applied externally to the hole to make the water in the leech’s body excessively excreted and cause the performance of dehydration, thus loosening the leech’s suction cup. It can be beneficial for the leech to take off by itself. The trauma must be given vigorous iodine and saline alternately to rinse, and strengthen the treatment of changing medicine for trauma, and inject tetanus antitoxin at the same time to avoid causing tetanus infection.