Difference between skin cancer and folliculitis

What is the difference between skin cancer and precancerous skin diseases? If skin cancer is treated as folliculitis, will the condition worsen? This is very likely, so we must distinguish them to avoid misdiagnosis and mistreatment of skin cancer. The following is a detailed introduction for everyone.

Early skin cancer often presents as erythematous or papular lesions slightly above the skin surface, often accompanied by scaly desquamation or crust formation on the surface, with symptoms similar to benign skin diseases such as psoriasis, eczema, and inflammation. As the lesion further develops, certain characteristic signs will appear, such as a shiny, translucent papular nodule with bleeding on the surface and telangiectasia, or a scar-like smooth fibrous plaque without obvious telangiectasia, ulcers, and protrusions. Or there may be black, fused dots in the lesion.
The above characteristics of skin cancer are very similar to the symptoms of certain precancerous lesions such as solar keratosis and keratoacanthoma, and it is difficult to distinguish them. Solar keratosis has rough erythema that is higher than the skin surface, and the surface is covered with scales. After removing the scales, the erythema often has no obvious protrusion. This is very similar to the erythema-like papules with clear boundaries and slightly higher than the skin surface of squamous cell carcinoma in situ, but the scales and crusts of the latter are more obvious, and the lesions are more substantial. Keratoacanthoma often occurs in exposed areas to sunlight. Without any warning signs, smooth red nodules will quickly appear within 2 to 3 weeks. There is a keratin embolus in the center, and dilated capillaries can be seen at the edge of the nodule. The nodules of squamous cell carcinoma that is distinguished from it are not smooth, and the edges of the nodules are translucent.