Nummular eczema, also known as nummular dermatitis or discoid eczema, is a chronic condition that causes coin-shaped spots to develop on the skin. It often appears after a skin injury, such as a burn, abrasion, or insect bite. And the condition may result in one patch or multiple patches of coin-shaped lesions which can last for several months.
Skin ringworm is a kind of infection of the skin caused by fungi. It may lead to red, itchy, scaly, circular rash even hair loss. Besides, ringworm is most common among children between ages 3 and 7, but it can affect adults, too.
The causes of nummular eczema include:
- Sensitive skin
- Temperature changes
- Dry skin
- Environmental irritants, such as soaps, metals, and formaldehyde
- Skin injury, such as an insect bite or abrasion
- Bacterial infection
- Some medications
The causes of ringworm include:
- Sharing personal items such as hats, clothing, towels, and combs with others.
- Exposure to other people who are suffering from ringworm.
- Exposure to pets. (rare)
- Using public exercise machines.
- Wearing rented bowling shoes, ski boots, skates or roller skates.
- Environmental factors including personal hygiene, living habits.