noun, na-adjective, noun which may take the genitive case particle 'no'
tendency to worry; worrywart nature
Describes a person's disposition or personality trait of worrying excessively about things. Often used in self-description or to characterize someone as a worrywart. Can be used as a noun or adjectivally with な or の.
See also: 心配性
私は心配症で、小さなことでもすぐ不安になる。
I'm a worrywart and get anxious over even little things.
彼女は心配症な性格だから、旅行の前はいつも荷物を何度も確認する。
She has a worrying nature, so before a trip she always checks her luggage many times.
Compound of 心配 (worry) and 症 (symptom/condition), literally 'worry syndrome'. The variant 心配性 uses 性 (nature/disposition). The exact origin is uncertain, but it likely arose as a colloquial term for a worrying personality.