Urticaria Symptoms, Treatment, and Causes скачать в хорошем качестве

Urticaria Symptoms, Treatment, and Causes

Urticaria, commonly known as hives, is a skin condition characterized by raised, itchy welts or bumps on the skin. There are several types of urticaria, each with distinct features: 1. Acute Urticaria: This type of urticaria typically lasts for less than 6 weeks and is often caused by allergies to certain foods, medications, insect stings, or infections. The welts appear suddenly and may disappear within hours or days. 2. Chronic Urticaria: Chronic urticaria persists for more than 6 weeks and can last for months or even years. The cause is often more challenging to identify compared to acute urticaria. Autoimmune reactions, hormonal imbalances, and other underlying health conditions might contribute to this type. 3. Physical Urticaria: This type of urticaria is triggered by physical stimuli like pressure, cold, heat, sunlight, or vibration. Symptoms occur at the site of contact with the trigger and may include itching, redness, and raised welts. 4. Dermatographic Urticaria: Also known as "skin writing" urticaria, this condition is characterized by raised welts that form in response to even minor skin irritation or scratching. The welts resemble the patterns drawn on the skin and usually fade within an hour. 5. Cholinergic Urticaria: Triggered by an increase in body temperature due to sweating, physical exertion, or emotional stress, cholinergic urticaria results in small itchy bumps surrounded by larger red areas. 6. Aquagenic Urticaria: This rare condition involves an allergic reaction to water, resulting in itchy hives when the skin comes into contact with water, regardless of its temperature. The exact cause is not well understood. 7. Solar Urticaria: Exposure to sunlight leads to the development of hives within minutes. It is considered a rare condition and is caused by an abnormal reaction to specific wavelengths of light. 8. Hereditary Angioedema: Although related to urticaria, hereditary angioedema causes deep swelling in the skin and mucous membranes rather than hives. It's a genetic disorder and can be life-threatening if it affects the airway. It's important to note that the symptoms and triggers of urticaria can vary from person to person. If you suspect you have urticaria, consulting a healthcare professional is recommended for proper diagnosis and management.