Psychology question?

She gets up, eats and then shuts herself in her room in the dark and binge watches the same comedy show over n over again all day and night, regularly. It's been a year now. First 3-5 months she regularly ate momos...20 momos a day. Next 8 months she eats 5-9 chocolate bars a day... constantly. She'll melt it and eat it while binge watching the same show.
She does nothing other than that. She is completely isolated and has shut out her family. She has no form of interaction with anyone at all. She has no friends. She stays in her room locked inside all day and night and always keeps the drapes shut and no light. She literally talks to no second person at all.
What is up with her?
Psychology question?
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