Acne: Another word for pimples or bumps that you get mostly on your face, but also may occur on your neck, chest, back and shoulders. Most acne happens when your skin makes too much oil. The oil mixes with dead skin cells and germs, called bacteria, and plugs up the little holes in your skin, called pores.

Actinic Keratoses: Rough, scaly patches on your skin that develop from years of exposure to the sun or tanning bed. These are commonly found on your face, lips, ears, back of your hands, forearms, scalp or neck.

Age Spots: Marks that commonly appear on the skin after prolonged ultraviolet (UV) exposure from the sun or tanning bed. These are harmless, but some people wish to remove them for cosmetic reasons. Other names for age spots include solar lentigos and liver spots, though they have no connection to your liver.

Alopecia Areata: A condition that causes your hair to fall out in round patches. It commonly occurs on your scalp, face and sometimes on other areas of your body. 

Athlete’s Foot: A fungal infection that usually begins between your toes. It commonly occurs in people whose feet have become very sweaty, while confined within tight-fitting shoes. Signs and symptoms of athlete’s foot include a scaly rash that usually causes itching, stinging and burning.

Atopic Dermatitis: A condition that makes your skin red and itchy. It is common in children but may occur at any age. It is long lasting (chronic) and tends to flare periodically. It may be accompanied by asthma, allergies or hay fever. 

Basal Cell Carcinoma (BCC): The most common form of skin cancer. These often appear as a slightly transparent or pink bump or patch on your skin, though it may take other forms. It is usually found on areas of the body damaged by ultraviolet (UV) rays from the sun or tanning beds. 

Benign Growths: These are non-cancerous growths. These include freckles, moles, skin tags, lipomas, keloids and cysts.  

Birthmarks: A colored mark on your skin that is present at birth or soon after you are born. Some fade with time; others become more noticeable. There are many kinds of birthmarks.

Calluses: Thickened layers of skin, often on your hands or feet, where friction repeatedly occurs.

Canker Sores: A small, shallow sore inside your mouth or at the base of your gums.

Cold Sores: Also called fever blisters — are a common viral infection. These are tiny, fluid-filled blisters on and around your lips and may also occur on other areas of your body.

Contact Dermatitis: A type of eczema, a condition that causes itchy, red, irritated skin. It happens when things you touch, or that touch you, annoy or irritate your skin. 

Corns: Thick, hardened layers of skin caused by friction and pressure.

Cysts: One of the most serious types of pimples. When blocked pores get irritated, they may form cysts, which may become filled with a whitish-yellowish liquid called pus.

Dandruff: Little bits of dry skin that form on your scalp and flake off.

Dermatitis: A word for eczema, or itchy, red, irritated skin.

Diaper Rash: A common form of inflamed skin (dermatitis) that appears as a patchwork of bright red skin on a baby’s bottom.

Dry Skin: Rough, dry skin with that may have scales or small cracks.

Dysplastic Nevi: These are atypical or abnormal moles.

Eczema: A condition that makes your skin irritated and itchy. Eczema often causes a rash that is red, blistery, oozing, scaly, or brownish. There are lots of types of eczema, but the most common is atopic dermatitis.

Folliculitis: An irritation of tiny pockets in your skin from which your hair grows.

Hair Loss: A condition that causes your hair to fall out.

Hives: Bumps that can pop up on your skin when you have been exposed to something that you are allergic to or that bothers your body. These bumps may itch, sting or burn.

Hyperhidrosis: Abnormally excessive sweating that may involve the hands, feet, underarms and face, usually unrelated to body temperature or exercise. 

Impetigo: An infection caused by a germ called bacteria. 

Ingrown Hairs: This may occur when hairs grow into your skin and may cause pain. 

Insect Bites: The bite of an insect, such as a bee or mosquito, which usually causes mild symptoms, such as itching and burning.

Itchy Skin: An uncomfortable, irritating sensation that creates an urge to scratch that can involve any part of the body.

Keloids: A thick bumpy scar that may happen after an injury, such as a piercing or after stitches.

Lichen Planus: A skin condition, that causes itchy, red or purple, flat-topped, scaly bumps on the arms and legs.

Melanoma: The deadliest type of skin cancer.

Moles: Spots on your skin that may be flesh-colored, pink, tan, brown, black or other colors. These are usually normal and may be there when you are born, or they may appear later in life.

Molluscum: A contagious skin condition that causes bumps (usually flesh-colored, pink or red) that may look like warts, but they are not. These are not serious, but they may spread easily.

Nail Fungus: A germ that can spread and cause an infection in your fingernails or toenails. 

Nail Growth Problems: Distortion and/or discoloration of the normal nail plate that may occur on the fingernails and toenails.

Psoriasis: A condition in which skin cells build up and form raised, red, itchy, scaly patches on the skin.

Rashes: Reactions to something that makes your skin red and often itchy.

Ringworm: A highly contagious, fungal infection of the skin or scalp.

Rosacea: A condition that causes redness and often small, red, acne-like bumps on the face.

Scaly Skin: A condition where the skin appears dry and flaky and may look like the scales of a fish.

Scars: A growth of tissue marking the spot where skin has healed after an injury.

Seborrheic Dermatitis: A common skin condition that causes scaly patches and red skin, mainly on the scalp.

Seborrheic Keratosis:  A noncancerous (benign) skin growth that appears as a waxy brown, black, or tan growth that some people develop as they get older.

Shingles: A viral infection that is caused by reactivation of the chickenpox virus in the body, causing a painful rash.

Skin Cancer: A condition that happens when cells in the skin get damaged and become abnormal and start growing too quickly. The sun is a major cause of skin cancer.

Skin Discoloration: A change from a person’s baseline skin coloration.

Skin Disease: An abnormal condition that negatively affects the structure or function of the skin and is not due to any external injury. 

Skin Infection: Invasion of the skin by disease-causing organisms, such as bacteria, fungus, viruses or parasites.

Skin Lesion: A part of the skin that has an abnormal growth or appearance compared to the skin around it. 

Skin Tag: A common benign outpouching of the skin that is typically connected to the underlying skin by a thin stalk. 

Squamous Cell Carcinoma (SCC): The second most common form of skin cancer. It is usually found on areas of the body damaged by ultraviolet (UV) rays from the sun or tanning beds. 

Stretch Marks: Scars that develop when the skin stretches or shrinks quickly and may appear as indented, reddened streaks from rapid weight gain or from weight changes.

Sunburn: Red, sometimes swollen, and painful skin caused by overexposure to ultraviolet (UV) rays from the sun or sunlamps. 

Warts: Bumps that may show up on your body, often on your hands and feet, and are caused by a germ called a virus. These are not serious, but they may spread easily.

Wrinkles: Folds, ridges or creases in the skin. Skin wrinkles typically appear as a result of aging, habitual facial expressions, smoking, habitual sleeping positions, loss of body mass, poor hydration and sun damage.