Dermatitis - Symptoms and causes - Mayo Clinic
网页Dermatitis is a common condition that causes swelling and irritation of the skin. It has many causes and forms and often involves itchy, dry skin or a rash. Or it might cause the skin to blister, ooze, crust or flake. Three common types of this condition are atopic dermatitis, contact dermatitis and seborrheic dermatitis.
Itchy skin (pruritus) - Symptoms and causes - Mayo Clinic
网页2024年1月17日 · Wool, chemicals, soaps and other things can irritate the skin and cause rashes and itching. Sometimes a substance, such as poison ivy or cosmetics, causes an allergic reaction. Also, reactions to certain medicines, such as narcotics to treat pain (opioids) can cause itchy skin. Sometimes the cause of the itching can't be determined.
Atopic dermatitis (eczema) - Symptoms and causes - Mayo Clinic
网页2024年5月15日 · Atopic dermatitis (eczema) symptoms can appear anywhere on the body and vary widely from person to person. They may include: Dry, cracked skin. Itchiness (pruritus) Rash on swollen skin that varies in color depending on your skin color. Small, raised bumps, on brown or Black skin. Oozing and crusting.
Pityriasis rosea - Symptoms & causes - Mayo Clinic
网页2024年7月12日 · Pityriasis rosea is a rash that often begins as an oval spot on the face, chest, abdomen or back. This is called a herald patch and may be up to 4 inches (10 centimeters) across. Then you may get smaller spots that sweep out from the middle of the body in a shape that looks like drooping pine-tree branches. The rash can be itchy.
Types of dermatitis (dermatitis pictures) - Mayo Clinic
网页2023年12月19日 · Common symptoms of atopic dermatitis are: Dry, cracked skin. Itchiness. Raw skin from scratching. Small, raised bumps, on brown or Black skin. Oozing and crusting. Thickened skin. Atopic dermatitis also is called eczema. It often occurs in the folds of the elbows, behind the knees and on the front of the neck.
Heat rash - Symptoms & causes - Mayo Clinic
网页2022年5月6日 · It is sometimes called prickly heat. Signs and symptoms include small, inflamed blister-like bumps and itching or prickling in the affected area. Occasionally, the inflamed bumps of miliaria rubra fill with pus. This form is called miliaria pustulosa. A less common form of heat rash is called miliaria profunda.
Contact dermatitis - Symptoms and causes - Mayo Clinic
网页2024年5月2日 · The rash can develop within minutes to hours of exposure, and it can last 2 to 4 weeks. Signs and symptoms of contact dermatitis vary widely and may include: An itchy rash. Leathery patches that are darker than usual (hyperpigmented), typically on brown or Black skin. Dry, cracked, scaly skin, typically on white skin.
Roseola - Symptoms & causes - Mayo Clinic
网页2022年6月29日 · Rash. After the fever goes away, a rash often appears. A roseola rash is many small spots or patches. These spots tend to be flat. The rash often starts on the chest, back and belly and then spreads to the neck and arms. It might reach the legs and face. The rash isn't likely to be itchy or painful. It can last hours or days.
Tinea versicolor - Symptoms & causes - Mayo Clinic
网页2024年7月13日 · The overgrowth of fungus that causes tinea versicolor interferes with the normal pigment production of the skin. This creates an uneven skin pigment. Tinea versicolor (TIN-ee-uh vur-si-KUL-ur) occurs most frequently in teens and young adults. Sun exposure may make tinea versicolor more apparent. Tinea versicolor, which is …
Neurodermatitis - Symptoms and causes - Mayo Clinic
网页2024年9月18日 · Symptoms of neurodermatitis include: An itchy, scaly skin patch or patches. Open sores that bleed. Thick, leathery skin. Discolored, wrinkled genital skin. Raised, rough patches that are inflamed or darker than the rest of the skin. The condition involves areas that can be reached for scratching — …