Acne, commonly known as pimples, manifests as acne, papules, pustules, and cystic nodules. In addition to affecting aesthetics, acne also brings great psychological shadows to teenagers and affects their physical and mental health. Our department is a leader in the treatment of acne in China, with outstanding features and excellent results. For mild acne, skin care, topical medication or fruit acid treatment are preferred. In addition to oral and topical medication for moderate to severe acne, needle clearing and photodynamic treatment are also available, especially for severe cystic acne. Laser and photodynamic therapy are new tools in acne treatment. For example, red and blue light can treat mild to moderate acne. Photodynamic therapy can be used for severe acne. Fractional laser or photorejuvenation can be used for skin reconstruction of acne marks and scars. Typical cases: Skin ulcers Clinically, skin defects that last for more than one month are called chronic ulcers. Its etiology mainly includes trauma, diabetes, vascular lesions, bacterial or fungal infections, tumors, neuropathy, hematological diseases, etc. In addition to the traditional methods of anti-infection, wound cleaning, wet dressing and drainage, laser physiotherapy, etc., we have invented artificial skin with independent intellectual property rights, which has the functions of sealing the wound, anti-infection and promoting wound healing, and can significantly accelerate the healing of the skin ulcer surface, which is a blessing for the majority of patients with refractory chronic skin ulcers. It can significantly accelerate the healing of skin ulcers, and is a blessing for patients with difficult-to-heal chronic skin ulcer. Typical cases.