A keloid scar is a red, purple or brown raised scar that can result after an injury. While scarring is a biological safety method to protect the skin, a keloid arises when the scar tissue multiplies beyond what is necessary to protect the wound.

Millions of women and men use hair dye to enhance, update or change up their look. Most people tolerate hair dye without a problem, but it can cause a reaction in some users. These reactions, known as contact dermatitis, are due to various chemicals in different types of hair dye.

Pigment loss can be worrisome. It's sometimes limited to small patches of skin but may be more generalized. Understanding the nature of the pigment loss is key to determining the most appropriate next steps.

If you’re red in the face, even when you’re not working out or feeling embarrassed, you could have rosacea.

Your body maintains a delicate balance with your blood to ensure you have enough blood and that it is not too thick or too thin. Over time, excess cholesterol or clotting factors in your blood can make your blood thicker and more likely to clot -- an occurrence that can lead to a heart attack or stroke.

Blisters are commonly caused by friction from tight shoes, herpes, chicken pox, poison ivy and allergic reactions. More uncommon are disorders that only cause blisters on the hands and feet. See your doctor for an accurate diagnosis if you have blisters on your hands and feet, particularly from an unknown cause.

Imagine watching day by day as your hair begins to fall out while brushing, and there does not appear to be much replacing it on your head. Slight thinning becomes apparent and you realize you are losing your hair.

Rashes are a common occurrence in children, but they can be a worrisome sight to parents. Most rashes in children are benign and will go away on their own, but some rashes require close examination and evaluation.

Stretch marks are a type of scar that occurs when the skin tears. They occur most often when you gain weight quickly and they are especially common during pregnancy. Stretch marks typically fade over time but generally don’t disappear completely.

There are many reasons for the development of bumps on the skin, which may range from a regular rash to something more serious such as cancer. If you notice bumps on the skin that resemble a volcano, it is important to seek medical advice as soon as possible for an accurate diagnosis of the problem.

Flesh-colored bumps are a common skin complaint. Depending on their location on the body, they can be unsightly, irritating or even painful, but most are harmless. Some of the more common types are moles, keratoses, keratoacanthomas and lipomas. The causes are as varied as the types and are often unknown.

The human papillomavirus, or HPV, causes hard, flat growths called plantar warts that occur on the soles of the feet. They are generally not contagious and disappear without intervention within 2 years, according to MedlinePlus.