Pityriasis rosea and ringworm (tinea corporis) are both skin conditions that cause round, discolored patches. Ringworm is contagious through skin-to-skin contact, while pityriasis rosea is not. Both ...

Psoriasis and ringworm (tinea corporis) cause scaly rashes but have different causes and treatments. Psoriasis is an autoimmune condition, while ringworm is a fungal infection. Because they can look ...