Hay fever, also called allergic rhinitis, can cause: • sneezing • Itchy nose, eyes, or roof of the mouth • Runny, stuffy nose • Watery, red or swollen eyes (conjunctivitis) A food allergy can cause: • Tingling in the mouth • Swelling of the lips, tongue, face or throat • hives • Anaphylaxis An allergy to insect stings can cause: • A large area of ​​swelling (edema) at the bite site. • Itching or hives all over the body. • Cough, chest tightness, wheezing, or shortness of breath. • Anaphylaxis A drug allergy can cause: • hives • Skin itch • Rash • Facial swelling • Wheezing • Anaphylaxis Atopic dermatitis, an allergic skin condition also called eczema, can cause the skin to: • Chop • blush • Scale or shell

An allergy begins when your immune system mistakes a normally harmless substance for a dangerous invader. The immune system then produces antibodies that remain alert for that particular allergen. When you are exposed to the allergen again, these antibodies can release a number of immune system chemicals, such as histamine, that cause allergy symptoms. Common allergy triggers include: • Airborne allergens, such as pollen, animal dander, dust mites, and mold • Certain foods, particularly peanuts, tree nuts, wheat, soybeans, fish, shellfish, eggs, and milk • Insect stings, such as from a bee or wasp • Medications, particularly penicillin or penicillin-based antibiotics • Latex or other substances you touch, which can cause allergic skin reactions.

Rosacea is a chronic skin condition that causes redness and pimples on the face. It can also cause eye irritation. Rosacea occurs most often in people between the ages of 30 and 50. Although women get rosacea more often than men, men tend to have more severe forms. Although the cause of rosacea remains unknown, it appears to involve a combination of genetic and environmental factors. It is not contagious. Signs and symptoms Rosacea usually develops over a long period of time and progresses to include one or more of the following: • Facial flushing: Persistent flushing and flushing with visible blood vessels. • Pus-Filled Pimples and Blackheads: Persistent facial redness with bumps or pimples that are inflamed and itchy. • Skin Thickening: Thickening and enlargement of the skin, usually around the nose. • Eye Irritation: Watery or bloodshot eyes, irritation, burning or stinging. Prevention Many people report that their rosacea flares up after exposure to certain triggers. Some common triggers for rosacea are sun exposure, spicy foods, caffeine, hot baths, alcohol use, and emotional stress. Early diagnosis and treatment of rosacea cannot prevent it, but it can control symptoms, ease discomfort, and prevent rosacea from progressing. Treatment With treatment and lifestyle modifications, rosacea can be effectively controlled. Rosacea treatments include oral and topical medications (such as doxycycline and Metrogel), lifestyle modifications, laser and light therapies. Your doctor will recommend a combination of treatments based on the severity and type of rosacea, your skin type, and the results of previous treatments.

Eczema (dermatitis) is an itchy rash with inflamed skin. Symptoms can range in severity from mild itching and redness to severe blistering and cracked skin. Acute eczema can be red, blistered, or oozing. Chronic eczema can become thickened, rough, and darker than the surrounding skin from prolonged scratching. Almost always, eczema itches. how it forms Atopic dermatitis, the most common form of eczema, causes dry, sensitive skin. It often appears in babies and young children who can "grow out of it" before school age. Contact dermatitis, another common type of eczema, is a localized skin reaction to an allergen or irritant, causing redness, inflammation, and intense itching. Other types of eczema appear on the lower legs (numerical or xerotic eczema), on the palms and soles of the feet as small, itchy blisters (dyshidrotic eczema), or on the scalp. Prevention Avoid irritants, such as strong soaps, hot water, detergents, and scented products. Moisturize with a thick emollient after bathing. Children and young adults often outgrow atopic dermatitis. Treatment Regular treatment can bring relief and can also reduce the severity and duration of eczema. Your dermatologist may prescribe external medications such as cortisone creams, ointments, or lotions. Internal medications such as antihistamines can help relieve itching. Oral antibiotics may be prescribed if there is also a secondary infection. Patch testing is an option for some cases of contact dermatitis. For severe cases, your dermatologist may recommend ultraviolet light (UVL) treatments.

Psoriasis is a chronic skin disorder that causes red, scaly patches on the extremities, trunk, scalp, and other parts of the body. Not Contagious The psoriasis rash goes through cycles of getting better and worse. A period of worsening is called a "flare." Psoriasis can occur in members of the same family, as there are specific genetic factors that make some people more susceptible to psoriasis. Signs and symptoms Psoriasis appears as red, thickened areas with silvery scales, most often on the scalp, elbows, knees, legs, arms, genitals, nails, palms, and lower back. It can be irritating or uncomfortable. Skin cells multiply more rapidly and accumulate on the surface in silvery flakes. Psoriasis comes in many forms. Each differs in severity, duration, location, shape, and pattern of the scales. The most common form, called plaque psoriasis, starts with small red bumps. They can become larger, raised, red patches that flake off. Some people with psoriasis on the skin also have joint pain. Prevention Identify and control triggers (such as stress, certain medications, alcohol, and smoking) and treat your skin with plenty of moisturizer. Avoid picking and scratching the skin. . Outbreaks sometimes occur in the winter, as a result of dry skin and a lack of sunlight. Moisturizing creams and lotions loosen scales and help control itching. Treatment Although there is currently no cure for psoriasis, there are multiple treatments available that can usually lead to the elimination of symptoms. Your doctor may prescribe medications to apply to the skin that contain cortisone compounds, synthetic vitamin D analogues, retinoids (derived from vitamin A), tar, or anthralin. Other types of treatment include coal tar, Goeckerman treatment, phototherapy, ultraviolet B (UVB) light, PUVA, excimer laser, methotrexate, cyclosporine, and biologic agents.

Vascular lesions are visible marks formed by blood vessels just below the surface of the skin, they can occur anywhere on the body. There are many types, all of them characterized by redness, including hemangiomas and vascular malformations. Hemangiomas Hemangiomas are basically a growth on the skin consisting of blood vessels, which is benign, though sometimes unsightly. They usually appear at birth or a few months later, are tumors or lesions consisting of blood or lymphatic vessels, and their size can increase rapidly before stopping and then reversing.