Contact dermatitis by definition is an inflammation or irritation of the skin in reaction to contact with a substance. Fragrances in creams, soaps and detergent, and some types of fabric fibres may cause irritant contact dermatitis. A person may even develop a rash after ingesting a disagreeable food which results in an allergic contact dermatitis. Contact dermatitis typically causes an itchy rash which is not contagious or spread from one person to another, but will likely be uncomfortable until it resolves.
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Symptoms
A rash from contact dermatitis can vary in how it manifests. The rash may be itchy, reddish or brownish, become cracked or scaly, appear dry or feel like the skin is thicker than usual. Bumps, blisters or hives are also common. A Rash can develop within hours or days of contact with the irritating substance. Burning, itchiness and tenderness may be experienced and the severity of discomfort will determine how intense the symptoms feel and look.
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Causes
Contact dermatitis on the bottom of the feet is often caused by overexposure to excess moisture due to sweating and contact with wet socks and shoes. Similar to other areas on the foot, contact dermatitis on the bottoms may also be caused by frequent exposure to a weak irritant or brief and sudden exposure to a stronger irritant. Weak irritants may include soaps and detergents and stronger irritants may include industrial cleaning solvents or plants, such as poison ivy.
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Treatment
It is important to determine what is causing the contact dermatitis and avoid exposure immediately. If sweaty feet are the suspected cause, it is a good idea to change socks often during the day and allow your shoes to dry completely before wearing them again. Infection can be prevented by using a mild, fragrance-free soap to wash and skin can be soothed with a cool compress or by applying over-the-counter anti-itch treatment. Benadryl can also help control the body’s reaction. It is recommended to seek medical attention if the rash becomes widespread, affects your sleep or does not completely resolve within a week or two. Immediate medical intervention is needed if you experience difficulty breathing or develop a fever or if pus is oozing from the skin.
