Skin cancer is associated with solar UV damage, which can damage the DNA of skin cells, leading to precancerous changes and the growth of cancer cells. Skin cancers arise from the epithelial tissue and are mainly basal cell carcinoma (BCC), squamous cell carcinoma (SCC) and malignant melanoma (MM), all of which are found in the superficial layer of the skin called the epidermis. Eighty percent of skin cancers are basal cell carcinomas, which can be completely cured with early diagnosis and proper treatment. According to the clinicians, there are 4 types of basal cell carcinoma, the most common one is nodular ulcerative type. 1.Nodular ulcerative type: Initially, a small wax-like nodule of small rice grain to pea size appears on the epidermis, with a rather hard texture and a few dilated capillaries on the surface, which is slightly higher than the skin surface, or only resembles erythema without elevation, or slightly nodular, and the skin on the surface is mildly depressed downward. The nodules may gradually expand or new lesions may appear and fuse with each other to form a waxy disc-shaped plaque, often with a brown, yellow-brown or dark gray scar in the center, followed by an ulcer under the scab, which gradually expands to form a round, oval or unshaped ulcer, ranging in size from a finger ring to a copper coin, with a solid and rolled-up ulcer margin, often translucent and uneven, without inflammation of the surrounding skin and with a pearl-like or wax-like appearance at the base. Sometimes the damage surface is completely covered by scabs. The ulcer slowly expands around and deeper, like a rat bite, forming a typical clinical pattern of basal cell carcinoma, so it is called erosive ulcer, which can partially heal and scar, or extend to subcutaneous tissue or even cartilage and bone. Various tissues can be destroyed and become deep pits. Occurring in the face, it can destroy cartilage and bone tissue in the nose, ear, orbit and maxillary sinus, causing bleeding or intracranial invasion or disfigurement. 2. Pigmented type: The nodules are flat and shallow, and the damage is the same as that of the nodular ulcer type. Due to the presence of more pigment, the edges of the damage have a pearly luster, but also dotted or reticulated dark brown or dark brown pigmented spots, and pigmentation can be seen in the central part, which can bleed easily when the scabs are uncovered, and under the scabs can be dark brown or even charcoal black particles, which is similar to malignant melanoma and can be easily misdiagnosed. 3. Hard patchy or fibrotic type: common in the head and neck, hard yellowish or yellowish-white patches, slightly elevated, with unclear borders, like hard patchy disease, can remain intact for a long time, and finally ulceration occurs. 4. Superficial type: superficial lesions, mostly on the trunk, with one or several infiltrative erythematous patches, with flaking or crusting on the surface, slightly elevated edges or the whole lesion, at least part of the edges are fine pearl-like or line-like dikes. This type may eventually become fibrotic. It resembles psoriasis, eczema, or seborrheic dermatitis. Basal cell carcinoma damage develops more slowly and regional lymph node metastasis usually rarely occurs, mainly infiltrating to deep tissue growth. There is also an invasive BCC, which is prone to recurrence after local surgery and can occur early with local lymph node attention, which is more malignant and needs attention. At present, surgical excision is still the most effective method for the treatment of BCC. Since BCC is found in the face and neck, especially around the eyes, cheeks and forehead, it is usually 0.5-0.8cm from the edge of the tumor, and is repaired by local tissues after excision, or by transferring local flaps. The difficulty of the surgery is to remove the tumor completely and repair it cosmetically, but the repair of BCC around the eyes is still difficult, taking into account the function and appearance of the eyelids.