Abnormal behavior. Help us if possible.

She does very abnormal things in home.As for example- She will wash everything if anybody touches except her anything in home doesn't matter it is electronics or something else or she will bath in chilled winter night if she will get touched by anybody including family members. Get irritated in small things. She burst out suddenly without any valid reason. She use to not to eat or talk for many days if she feels that she is insulted but actually nobody dares to insult her bacause of her behavior. If any discussion is going on and if a word came against her accidentally she minds that very badly and stop talking and eating. She does weird things, speak things also think weird things. This is happening from last 8-10 years. In starting days everybody thaught that it will end after sometime but it has worsen. That's the reason I've searched on google for any solution and landed here. Please help us if possible.