In our daily life, soft tissue swellings on the body surface are very easy to detect by the patients themselves. Patients with body surface masses are often seen in general surgery, dermatology and plastic surgery departments. Some patients can be effectively treated in dermatology, while for those who need surgical treatment or have higher cosmetic needs, treatment in plastic surgery will have more satisfactory results. Body surface masses are tumors or other lesions originating from superficial skin soft tissues such as skin, skin adnexa, and subcutaneous tissues, and are classified as benign or malignant, with benign being the most common. Today, we will briefly introduce some common benign surface skin soft tissue swellings and lesions. Pigmented nevus is a common benign lesion containing pigmented nevus cells, mostly found on the skin and occasionally on the surface of mucous membranes, and can appear at birth or at any time thereafter, in any part of the body. They can be classified as intradermal nevi, junctional nevi, mixed nevi, etc. They are mostly brown or black in color. Pigmented nevi that occur in friction-prone areas, such as the palms of the hands, soles of the feet, and peri-waist, as well as mucous membrane areas such as the lips and perineum, have a certain risk of “malignant transformation” and should be taken seriously. Lipoma is a common benign tumor that can occur in any part of the body that has fat. Some of them can also occur in the extremities, mainly under the skin, but also in the deep parts of the limbs or between the muscles and belly. Lipomas have a low chance of malignancy and are easily removed surgically. 3.Sebaceous cyst Commonly known as powder tumor, it is a retention cyst caused by the obstruction of sebaceous secretion, and the cyst cavity is filled with white bean curd-like contents. 4.Dermatomal cysts are congenital disorders, often located in the subcutaneous, occasionally seen in the submucosa or internal organs. Depending on the location of the cyst, the cyst may contain different components such as teeth, nails and cartilage-like or bone-like structures. Treatment is complete surgical excision. 5.Neurofibromas Isolated neurofibromas, locally solitary, mostly distributed in superficial areas such as the dermis or subcutis. When the masses increase to a certain extent, they can cause local and adjacent organs to drop and shift, resulting in obvious deformities, and can also cause some symptoms and functional disorders; neurofibromatosis, a familial genetic disease, can involve all organs and systems of the body. The number is variable, the size varies, and may hang loosely from the skin surface with obvious deformities. When it affects function and form, it can be completely or partially excised; when the excisional wound is huge, it can be repaired by skin slice or flap. 6.Papillary skin tumor Due to unexplained squamous epithelial proliferation, papillary protrusions are formed on the skin surface. Single or multiple, often with keratinization on the surface. Depending on the specific condition, laser or surgical removal can be chosen if necessary.