A mole should be checked when it is new, changing, painful, bleeding, itching, scabbing, or noticeably different from your other spots. A skin mole to worry about may also have uneven borders, multiple colors, rapid growth, or changes in size, shape, or color.

The next step is to compare the mole with your usual skin pattern, take a clear photo, and note when the change started. A dermatologist can examine the mole, use dermoscopy when needed, and perform a biopsy if cancer is possible.

Your skin may hurt to touch because of irritation, inflammation, injury, infection, or abnormal nerve signals. When skin hurts to the touch without a visible rash, allodynia may be involved, meaning that light clothing, hair brushing, or gentle contact causes pain that would not normally occur.

Treatment depends on the cause and may involve avoiding irritants, treating a skin condition, or managing nerve-related pain.

Persistent pain, widespread tenderness, weakness, numbness, fever, or a new rash should be assessed by a medical professional. An exam can help determine whether the pain comes from the skin, damaged nerves, or another underlying condition.

A pimple under the skin is a deep, inflamed acne lesion that forms when oil, dead skin cells, and bacteria become trapped inside a blocked hair follicle. It may feel like a painful, firm lump without a visible head and may be called a blind pimple, acne nodule, or cyst.

Treatment may include warm or cold compresses, benzoyl peroxide or salicylic acid, and prescription acne medication for persistent or severe lesions. Avoid squeezing the bump because this can increase inflammation, infection risk, discoloration, and scarring.