To suffer mentally; to have one's mental or emotional health affected (e.g., due to stress or trauma).
長期間の過重労働で彼は心を病んでしまった。
He developed mental health problems after a long period of overwork.
家族の死をきっかけに心を病む人も少なくない。
It's not uncommon for people to suffer mentally after the death of a family member.
早めに相談しないと、さらに心を病む可能性がある。
If you don't seek help early, there's a risk of worsening mental health.