Certain types of skin cancer, such as basal cell and squamous cell skin cancer, can cause itchy or painful skin lesions, according to WebMD. Melanoma, however, is less likely to exhibit those symptoms.
The most common sign of skin cancer is an abnormal change in the way skin looks and feels, according to the American Academy of Dermatology. Basal cell carcinoma, the most common form of skin cancer, may cause red dry patches of skin or recurring sores that bleed. Squamous cell carcinoma grows on the areas of the skin that receive a lot of sunlight. Signs of squamous cell carcinoma include scaly, reddish bumps or patches on the skin and lip. Melanoma may appear as dark streaks under a fingernail or moles that change in color or size.