It seems that she suffered from a kind of depression from around 865, which was implied in "Konjaku Monogatari (Shu)" (The Tale of Times Now Past) as she was annoyed by mononoke (evil spirits).
また、貞観(日本)7年（865年）ごろから一種のうつ病のようなものにかかっていたらしく、それらしき記述（物の怪に悩まされる）が『今昔物語集』などに見られる。