Acne vulgaris (acne) is an acute or chronic inflammation of the sebaceous glands of the hair follicles. There are various types of damage such as blackheads, papules, pustules, nodules, abscesses, cysts and scars, which occur on the face and chest and back. The common types are acne vulgaris and acne aggregata. This disease, also known as youth acne, occurs most often in adolescent men and women and is often accompanied by seborrhea. After puberty, most acne heals naturally or is reduced. The cause of acne in Chinese medicine is unclear lung qi and external wind-heat; it can also be caused by poor diet, excessive consumption of fat, sweet and thick flavors, and heat in the stomach; it can also be caused by menstrual disorders and heat stagnation. Chinese medicine considers acne to be caused by internal heat and external wind, but there are lung heat, blood heat, liver heat, and internal heat of Yin deficiency. Pustules and other skin lesions are caused by wind heat and toxic heat. Cystic acne polymeric acne and other inflammatory symptoms are not obvious, and the chronic process is a symptom of cold sores and cold ulcers. Another example is scar acne which can be caused by Qi stagnation and blood stasis. Pathology 1. Hypertrophy of the sebaceous glands, hyperkeratosis of the follicular funnel and the opening of the sebaceous ducts, enlargement of the follicles, and the formation of blackheads at the mouth of the follicles. 2, there is inflammatory infiltration around the hair follicle mainly by lymphocytes, forming inflammatory papules. Secondary infection inside and outside the hair follicle caused by blackhead obstruction can appear as pustules. Blackheads or pustules penetrate the follicle wall into the dermis, which can cause foreign body granulomatous reaction, and nodules are formed. Nodules become secondary to infection and form abscesses. Long-term inflammatory reaction can cause the destruction of hair follicles and sebaceous glands and fibrosis, resulting in pathological changes of scars. Common symptoms: Depressed eyebrows, chin acne, convergent acne, infantile blackhead acne, back acne, liver qi nodules, depressed scarring, acne between both eyebrows, horn plugs, cysts, papules, papulopustular acne. Clinical typing 1. Papulopustular acne: The lesions are mainly inflammatory papules, and there may be a blackheaded pimple or a fatty pimple with an unblackened tip in the center of the papule. 2. Pustular acne: The lesions are mainly pustules and inflammatory papules. Pustules occur at the top of the papule, and after breaking down, sticky pus can flow out. 3.Cystic acne: Most sebaceous cysts of different sizes are formed, often secondary to purulent infection, breaking down and flowing pus, forming sinus tracts and scars. 4, nodular acne; pustular acne inflammation site is deeper, forming thick-walled nodules, light red or purplish red, varying in size and depth. Those in deeper locations may have obvious elevations in the shape of hemispheres or round vertebrae. If they exist for a long time, some of them are gradually absorbed, while others are septic and break down to form scars. 5.Atrophic acne: Papular or pustular damage destroys the glands and causes small pit-like atrophic scars. 6. Aggregative acne: The damage is polymorphic, with many pimples, papules, pustules, cysts, abscesses and sinus tracts, and scars (atrophic or hyperplastic scars) occurring in clusters and persisting. 7. Cachexia acne: The damage is a dark red or purple-red papule, pustule or nodule, soft in texture, and containing pus and blood. It is painless, progresses slowly and does not heal over time. Most often seen in patients who are physically weak.