Other types of lesions

There are many other types of lesions that are benign. Skin tags, dermatofibroma (reddish brown spots found on extremities), cherry angiomas (red vascular growths), lipomas, cysts and milia, are all types of lesions that you may find on your skin. Only a dermatologist or qualified doctor can diagnose what type of lesion you have, so it's best to check anything suspicious with a professional. 

Malignant skin lesions 

The types of moles that you should worry about are melanomas or non-melanomas -- skin cancer. Skin cancer is the most common form of cancer. These two types of skin cancer vary in diagnosis and treatment, but it's important to know their signs and differences. 

Melanomas are the most dangerous form of skin cancer. They are rarer than non-melanomas but are far more problematic. Melanomas cause malignant tumors that can spread to different parts of the body. They begin in a part of the skin called the melanocyte, which creates melatonin, the skin's pigment. This is why they are often brown or black in color. Many times, melanomas can start on the back or chest in men and on the legs in women. It's important to note that people with darker skin have less risk of developing melanomas, but they still can get melanomas.