Hives and angioedema - Symptoms and causes - Mayo Clinic
2023年10月27日 · Angioedema can arise with hives or alone. It causes swelling in the deeper layers of skin, often around the face and lips. Short-lived (acute) hives and angioedema are common. Most times, they are harmless, clear up within in a day and don't leave any lasting marks, even without treatment.
Chronic hives - Symptoms and causes - Mayo Clinic
2024年10月1日 · Hives — also called urticaria (ur-tih-KAR-e-uh) — is a skin reaction that causes itchy welts. Chronic hives are welts that last for more than six weeks and return often over months or years. Often, the cause of chronic hives isn't clear.
Hives and angioedema - Diagnosis and treatment - Mayo Clinic
2023年10月27日 · To diagnose hives or angioedema, your doctor will likely look at your welts or areas of swelling and ask about your medical history. You may also need blood tests or an allergy skin test.
Chronic hives - Diagnosis and treatment - Mayo Clinic
2024年10月1日 · Where hives appear and how long it takes a welt to fade and whether it leaves behind a bruise or other mark. Whether your hives come with painful swelling. You also may need blood tests to determine the cause of your symptoms. An accurate diagnosis will …
Dermatitis - Symptoms and causes - Mayo Clinic
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.
Contact dermatitis - Symptoms and causes - Mayo Clinic
2024年5月2日 · Contact dermatitis shows up on skin that has been directly exposed to the substance causing the reaction. For example, the rash may show up along a leg that brushed against poison ivy. The rash can develop within minutes to hours of exposure, and it …
Types of dermatitis (dermatitis pictures) - Mayo Clinic
2023年12月19日 · Dermatitis also is called eczema. Symptoms include itchiness, scaly skin, a swollen rash, oozing blisters and dandruff-like scaling. The condition is not passed from person to person. Learn about the symptoms of common types of dermatitis.
Seborrheic dermatitis - Symptoms and causes - Mayo Clinic
2024年7月19日 · Seborrheic (seb-o-REE-ik) dermatitis is a common skin condition that mainly affects your scalp. It causes scaly patches, inflamed skin and stubborn dandruff. It usually affects oily areas of the body, such as the face, sides of the nose, eyebrows, ears, eyelids and chest.
Pityriasis rosea - Symptoms & causes - Mayo Clinic
2024年7月12日 · Pityriasis rosea typically begins with an oval, slightly raised, scaly patch — called the herald patch — on the face, back, chest or abdomen. Before the herald patch appears, some people have headache, fatigue, fever or sore throat.
Scarlet fever - Symptoms & causes - Mayo Clinic
2022年6月7日 · The red rash of scarlet fever usually begins on the face or neck, later spreading to the chest, trunk, arms and legs. Scarlet fever is most common in children 5 to 15 years of age. Although scarlet fever was once considered a serious childhood illness, antibiotic treatments have made it less threatening.