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Hair & Nail Diseases

Basic information about normal hair and nails, and various conditions that affect the hair, fingernails, and toenails.
  1. Excess Hair (4)
  2. Hair Loss (8)
  3. Hair Removal (1)
  4. Head Lice (3)
  5. Nail Diseases (9)

Fungal Nail Infections - Onychomycosis
A fungal infection of the nails causes thickened, discolored nails that can be painful. Find out what fungal nail infections look like and how they are diagnosed and treated.

Paronychia - Infection of the Skin Around the Nail
Paronychia, an infection of the skin around the nail, is the most common hand infection in the United States. Find out more about the cause and treatment of paronychia.

Ingrown Nails
Find out more about what causes ingrown toenails and how they are treated.

Nail Anatomy
Fingernails and toenails are made of more than just the nail we see. Find out more about nail anatomy and growth.

Head Lice
Head lice are parasitic insects found most commonly behind the ears and near the neckline at the back of the neck. Find out more about what head lice look like and how they are treated.

FDA Lindane Advisory
The FDA has issued an update on the labeling of Lindane, a medication used to treat head lice. Lindane is considered a second-line treatment for head lice because of its significant potential side effects.

Hair Removal Methods
A discussion of various hair removal methods from bleaching and shaving to hair removal procedures and a new medication that prevents regrowth of hair.

Bald Spot
Alopecia Areata is an unpredictable, non-scarring, patchy hair loss condition that usually resolves on its own. Find out more about what causes this condition and what can be done about it.

Is Hair Loss Inherited?
Is hair loss inherited?

Hair Disorders
This site has facts about various hair diseases from the Merck Manual

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