The red marks produced by mouth suction are called pressure purpura in dermatology, which is caused by the increase in capillary permeability and extravasation of red blood cells due to excessive local pressure. Usually, it can subside without special treatment. If you have the will to subside quickly, you need to take oral vitamin C capsules, rutin tablets and calcium carbonate D3 tablets with compound glycopyrrolate capsules three times a day, two capsules at a time. A decoction of fresh amaranth, cypress, honeysuckle, raw earth charcoal and double flower charcoal can be applied to the affected area for 20 minutes twice a day to clear heat and detoxify the blood, and to avoid alcohol and spicy and stimulating foods.