Noticing red, round patches on your arm can be unsettling—especially when they show up in clusters or slowly grow. The first question most people ask is simple: Is this contagious? The answer depends on what’s causing the rash. Some circular rashes spread through contact, while others don’t spread at all.
Let’s break it down fast and clearly.
A Common Contagious Cause: Ringworm (Fungal Infection)
One of the most frequent causes of red, circular patches is ringworm, medically known as tinea corporis. Despite the name, there’s no worm involved—it’s a fungal skin infection that thrives in warm, damp areas.
Typical signs include:
Red, round or oval patches
Slightly raised, scaly edges
A lighter or clearer center
Mild to moderate itching
Yes—ringworm is contagious. It can spread through:
Skin-to-skin contact
Sharing towels, clothes, or gym gear
Touching contaminated surfaces
Contact with infected pets
If the patch slowly expands or new circles appear nearby, a fungal infection becomes more likely.
Non-Contagious Lookalikes: Eczema and Psoriasis
Continue reading on next page…