Why my father keep hitting me and told everyone I have a crazy sick daughter, what should I do?

my father keep hitting me and told everyone I have a crazy sick daughter, what should I do? What should I do when he hit me? Should I stay watch or hit him back?

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I’m 37abd my sisters are jealous of me, as I have epilepsy, they are laughing at me, whenever we have an argument, my dad hits me.
Why my father keep hitting me and told everyone I have a crazy sick daughter, what should I do?
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