Boils, carbuncles and gangrene are four kinds of skin diseases occurring on the surface of the body with different etiology and shape characteristics, and the choice of medicines for clearing away heat and removing toxins, activating blood circulation and removing blood stasis is very effective in the treatment of boils, carbuncles and gangrene. Furuncle: at the beginning, it is like a corn, with deep roots and small shape, like a needle, with white top and pain, due to the attack of evil poison and stagnation of qi and blood. Safflower and Rhizoma Chuanxiong can be used to activate qi and blood. Boils: superficial and limited, small and round, red, swollen, hot and painful, easy to ulcerate, easy to converge, recurrent, due to the accumulation of dampness and heat (dampness and heat in the body of the mutual agglomeration of evil). It is caused by the accumulation of heat and dampness (the accumulation of heat and dampness in the body). Carbuncle: red, swollen, hot and painful, shallow and tall, easy to eliminate without pus, easy to ulcer if pus has been formed, due to heat and toxic fumigation, stagnation of qi and blood. Honeysuckle and forsythia can be used to remove heat and toxins. Gangrene: diffuse swelling without head, unchanged skin color, unclear boundary, no heat and little pain, difficult to eliminate pus, difficult to ulcerate pus, due to stagnation of qi and blood. Available honeysuckle, dandelion to clear heat and activate blood. It should be noted that: if you suffer from boils and carbuncles, you should eat a light diet to avoid greasy, cold and spicy food, and you should consult a doctor in a timely manner, and the drugs need to be used under the guidance of a physician, and should not be taken on their own.