A sunburn is a radiation burn to the skin produced by overexposure to ultraviolet (UV) light, commonly from the sun’s rays. A similar burn can be produced by overexposure to other sources of UV, such as tanning lamps and welding arcs. Exposure of the skin to lesser amounts of UV will often produce a suntan.
Radiodermatitis is a skin disease associated with prolonged exposure to radiation.
Hypertrichosis, or Human Werewolf Syndrome, is a medical term referring to a condition of excessive body hair.
Ingrowing nail or Onychocryptosis, commonly known as ingrown nails (unguis incarnatus), is a common form of nail disease. It is a painful condition in which the nail grows or cuts into one or both sides of the nail bed. While ingrown nails can occur in both the nails of the hand and feet, they occur most commonly with toenails.
Beau’s lines are deep grooved lines that run from side to side on the fingernail. They may look like indentations or ridges in the nail plate.
The nail is made of a hard protein called keratin – a protein which is one of the building blocks which make up the body. The nails help protecting the ends of the fingers and toes from trauma, and also help us picking up small objects.
Chloasma, or melasma or the mask of pregnancy when present in pregnant women is a tan or dark facial skin discoloration. Although it can affect anyone, chloasma (melasma) is particularly common in women, especially pregnant women and those who are taking oral contraceptives or hormone replacement therapy medications.
Ephelides or freckles or xeroderma pigmentosum, are tanned macules found on the skin. They are usually multiple in number. With sun exposure, they become more apparent; therefore, in the winter months, they are often imperceptible. Although ephelides are predominantly benign, they may be seen in association with systemic disease.
Freckles are small brownish spots of melanin on the skin of people with fair complexion. Predisposition to freckles is genetic and is related to the presence of the melanocortin-1 receptor MC1R gene variant. Freckling is caused by the same process as that which produces sun tanning, although the distribution of melanin is uneven. Most people who have freckles have light skin.
The skin is often known as “the largest organ in the human body”. This applies to exterior surface, as it covers the body, appearing to have the largest surface area of all the organs.