Rash or Hives: Skin allergies often manifest as red, itchy rashes or raised welts known as hives. These skin reactions can occur suddenly after exposure to an allergen, such as certain foods, medications, insect bites, or contact with irritants like soaps or cosmetics.

Itching: Persistent itching or pruritus is a hallmark symptom of many skin allergies and diseases. Itching may be mild to severe and can significantly impact quality of life, leading to discomfort, sleep disturbances, and skin damage from scratching.

Swelling: Skin allergies can cause localized swelling or edema, particularly in areas where the skin has been exposed to an allergen. Swelling may occur alongside other symptoms such as redness, warmth, and tenderness.

Eczema (Atopic Dermatitis): Eczema is a chronic inflammatory skin condition characterized by dry, itchy, and inflamed patches of skin. It often presents with redness, scaling, and crusting, and may be triggered or exacerbated by allergens, irritants, stress, or changes in temperature or humidity.

Contact Dermatitis: Contact dermatitis is a type of skin inflammation that occurs when the skin comes into contact with an irritant or allergen. Symptoms may include redness, swelling, itching, and blistering in the area of contact. Common triggers of contact dermatitis include soaps, detergents, cosmetics, metals (e.g., nickel), and certain plants (e.g., poison ivy).