Is it acne or rosacea? One of the most common signs of rosacea, bumps, and pimples, is also one of the most common causes of confusion about the skin condition.

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There are a number of skin conditions that cause bumps and growths to appear on the surface or just below the skin.

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Irregular areas in which there are changes in skin color are a common problem with a wide array of potential causes.

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Learn which types of skin diseases are contagious.

• Athlete's foot: How to prevent
• Cold sores
• Genital herpes
• Genital warts
• Head lice
• Herpes simplex
• Impetigo
• Molluscum contagiosum
• Nail fungus
• Ringworm
• Scabies
• Shingles
• Warts

From chemical peels, botox, and fillers, find out which cosmetic treatment is right for you and what questions you should ask before getting a cosmetic treatment.

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Do you have really dry or excessively sweaty skin? Find out the causes of your symptoms and learn how you can manage your condition.

• Dry skin
• Dry, scaly, and painful hands could be hand eczema
• Hyperhidrosis

Eczema and dermatitis are terms for a group of skin conditions that cause the skin to become inflamed or irritated. Learn about the causes, symptoms, treatment, and prevention of these common skin conditions.

• Eczema Resource Center - Caring for a child with eczema
• Atopic dermatitis
• Contact dermatitis
• Dry, scaly, and painful hands could be hand eczema
• Dyshidrotic eczema
• Neurodermatitis
• Nummular dermatitis
• Stasis dermatitis

Many people have hair or scalp problems. Their hair may be thinning or falling out, break off, or grow slowly. Dandruff or an itching or peeling scalp may cause discomfort.

• Alopecia areata
• Dandruff: How to treat
• Hair loss
• Scalp psoriasis

Are you suffering from itchy skin? Find out the possible causes that are making you want to scratch.

• Bed bugs
• Hives
• Poison ivy, oak, and sumac

Learn about the diseases and conditions that may cause painful skin and joints.

• Hidradenitis suppurativa
• Pemphigus
• Psoriatic arthritis
• Scleroderma

Learn about rash types, treatments, causes, symptoms, diagnosis, and prevention.

• Cellulitis
• Diaper rash: How to treat
• Lichen planus
• Lupus and your skin
• Nickel allergy
• Perioral dermatitis
• Pityriasis rosea
• Rash 101 in adults: When to seek treatment

There are many reasons why your skin might look scaly. Learn about the diseases and conditions that may cause scaly skin.

• Actinic keratosis
• Psoriasis
• Psoriasis video library
• Seborrheic dermatitis

Find skin cancer information and treatment options and learn how you can prevent and detect the disease.

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The Academy produces this video library to demonstrate dermatologist-recommended tips you can use to properly care for your skin, hair, and nails.

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"Ask a Dermatologist” features board-certified dermatologists answering questions submitted by the public.