Ulcers look like worms

It can be seen in basal cell carcinoma. 85% of patients develop rare skin lesions of palmoplantar and mucous membranes in the exposed parts of the head and neck. They usually occur singly but there are several or even most of them. In the early stage of basal cell carcinoma, local skin is slightly raised, pale yellow or pink. The small colored nodules are only the size of a needle or mung bean, and they are translucent nodules. They are hard and have a thin epidermis, accompanied by dilation of capillaries but no pain or tenderness. The skin on the surface of the deeper epidermis is slightly sunken and loses its normal luster and texture. After months or years, scale-like desquamation appeared, and subsequent scabbing, scaling showed ulceration and bleeding. When the lesions continue to increase, superficial ulcers form in the middle, and the edges are uneven like worm-eaten.