Various dermatologic situations affecting the skin can reason itchiness and rashes, but only some are connected to an allergy. There are many types of skin allergies and rashes that can reason itchiness and inflammation. However, not all rashes that itch are connected to skin allergies. For example, insect bites and autoimmune situation along with fungal, bacterial, and viral infections can all cause a rash to appear.
Atopic Dermatitis (Eczema)
Atopic dermatitis, more usually known as eczema, frequently happens in young children, although it may start in young adults, and can continue into adult life. The rash of atopic dermatitis, often called eczema, happens where a person scratches. In infancy, the rash occurs on the chest, cheeks, and scalp, where the child is able to scratch. Older children and adult typically have the rash in the skin folds of the elbows and behind the knees, although may also happen on the face, neck, hands, feet, and back.
The rash is red, often flakes or oozes, and has small blisters or bumps. There are often excoriations, or areas of broken skin, from aggressive scratching.
While there are at-home treatments for eczema available, atopic dermatitis has been linked to food allergies in children, so a thorough evaluation by an allergist/immunologist may be in order if you or your child experiences this type of rash.
Urticaria (Hives) and Angioedema (Swelling)
Urticaria, commonly referred to as hives, is an itchy rash that can occur at any age. This rash appears as raised red bumps of various shapes and sizes and typically lasts for only minutes to hours. While it can be very itchy, a person will generally not excoriate (a scratch to the point of breaking the skin and reason bleeding) themselves. Urticaria can be acute (lasting less than six weeks) or chronic (lasting more than six weeks).
The swelling that sometimes goes along with urticaria is called angioedema and often involves the lips, the eyes, and the hands and feet. Angioedema is usually not itchy or red; it tends to burn, sting, or cause a tingling sensation.
Contact dermatitis is caused by direct skin contact with a substance that causes a rash-like reaction. People react to a variety of chemicals, including cosmetics, hair dye, metals, and topical medications. An example of contact dermatitis is a rash from poison ivy, which is an extremely itchy and appears as blisters that ooze and crust after contact with plants of the Toxicodendron family.Leave a reply