Sisi is a 17-year-old girl who

is about to finish high school. Since primary school, Sisi has been under the

impression that her dimples are large and making her unattractive. As a result,

she always wears a hoodie. Sisi has fantasies about being in a relationship,

but shuns boys’ attempts to go out on dates with her because she feels

embarrassed about her dimples. She spends most of her time on the Internet

looking for facial products to “close” her dimples. Sisi also wears heavy

makeup to cover the dimples to look more “attractive”. One morning, she was

preparing for school and realised that her makeup products were missing after forgetting her toiletry bag at her sister’s house over the weekend while visiting. Despite knowing she had an important test scheduled for that

day, Sisi missed school and instead took a taxi to her sister’s house to fetch her

toiletry bag. Based on your knowledge of psychological disorders, classify

Sisi's abnormal behaviour according to the DSM-5-TR classification system.

Sisi’s behaviour is consistent

with someone who has a/an-----------------.