ringworm; tinea corporis
A fungal skin infection causing a ring-shaped rash; commonly referred to as ringworm of the body. In everyday Japanese, the kana form たむし is standard.
I tend to get ringworm in the summer.
Antifungal medication is used to treat ringworm.
jock itch; ringworm of the groin; tinea cruris
Katakana spelling is sometimes used for emphasis or in medical labeling.
Rare kanji form; the characters literally mean 'rice field insect' but are used here for the skin condition.
Rare medical kanji form; not commonly used in everyday writing.
The origin is uncertain; the kanji 田虫 (rice field insect) may reflect a folk belief linking the condition to insects in wet fields, but this is speculative.