疳の虫
Noun
1
noun (common) (futsuumeishi)
convulsions (in a child);nervousness;short-temperedness
2
noun (common) (futsuumeishi)
bug thought to cause children's diseases
Other forms
かんの虫 【かんのむし】 · 癇の虫 【かんのむし】 (word containing irregular kanji usage)