Pus-filled pimples on the face may refer to cystic acne, which may be red, itchy and painful. Cystic acne, a type of acne, has a complex cause, which is considered to be related to negative emotions, poor diet, irregular work and rest, and the proliferation of Propionibacterium acnes. However, the main causes are due to decreased skin resistance, long-term accumulation of toxins, and endocrine disorders. The locations where cystic acne grows mainly include the cheeks, forehead, chin, and corners of the mouth, resulting in localized yellowish-white inflammatory papules and pustules. In cystic acne, the skin may be red and itchy, sometimes accompanied by significant pain. It is recommended that patients with cystic acne pay attention to local hygiene, do not scratch or squeeze the local area to avoid triggering infections, can go to the dermatology department of the hospital, under the guidance of the doctor to give the appropriate medication for severe nodules or cysts can be assisted with the use of intradermal steroid hormone injections.