Discoid Eczema

Key Points

Overview

Discoid eczema, also known as nummular or discoid dermatitis, is a chronic skin condition characterized by itchy, swollen, and cracked skin that forms distinct circular or oval patches. These patches can appear anywhere on the body, though they typically avoid the face or scalp. The condition can persist for weeks, months, or even years without proper treatment and often reappears in the same areas. It usually begins as small spots or bumps that quickly merge into larger patches, ranging from a few millimeters to several centimeters in size. On lighter skin, these patches appear pink or red, while on darker skin, they can be dark brown or paler than the surrounding skin. Initially, the patches may be swollen, blistered, and ooze fluid, causing intense itching, particularly at night. Over time, the affected areas can become dry, crusty, cracked, and flaky. Sometimes, the center of a patch may clear, leaving a discolored ring that can be mistaken for ringworm. While the exact cause is unknown, very dry skin or irritation from substances like soaps may contribute to its development. Although it is a long-term condition, various treatments are available to help manage symptoms and keep it under control.

Signs and Symptoms

• Distinct circular or oval patches of eczema
• Small spots or bumps that merge into larger patches
• Pink or red patches on lighter skin
• Dark brown or paler patches on darker skin
• Swollen, blistered, and oozing patches
• Intense itching, especially at night
• Dry, crusty, cracked, and flaky skin patches
• Center of patch sometimes clears, leaving a ring
• Dry skin between affected patches
• Signs of infection: excessive oozing, yellow crust, hot/swollen/tender skin, feeling sick or feverish

Things That Increase the Risk

• Having particularly dry skin
• Skin irritation from soaps, detergents, or chemicals
• History of contact dermatitis
• Minor skin injuries like insect bites or burns
• Certain medications (consult your doctor before stopping)
• Living in dry environments
• Exposure to cold climates
• History of atopic eczema

Diagnosis

• Physical examination of affected skin by a GP
• Review of symptoms and medical history
• Tests to rule out other skin conditions (if necessary)
• Referral to a dermatologist for uncertain diagnoses
• Patch testing by a specialist (if needed)

Treatment & Management

• Emollients (moisturizers) to prevent dry skin
• Topical corticosteroids (steroid creams/ointments) for severe symptoms
• Antihistamines to reduce itching
• Antibiotic creams for infected patches
• Oral antibiotics for severe infections
• Avoiding irritating chemicals in personal care products

Prevention

• Regularly moisturize dry skin
• Avoid harsh soaps, detergents, and bubble baths
• Identify and avoid personal skin irritants
• Protect skin from minor injuries like insect bites
• Manage underlying dry skin conditions
• Consider humid environments if possible

Related Diseases

• Atopic Eczema
• Contact Dermatitis
• Varicose Eczema
• Ringworm

Available Treatments

Explore our range of treatment options for Discoid Eczema: