Dear doctor

my mom did hysterectomy around 5 years back.Now she doesnt eat,sleep well and always tired.She is always upset about small issues and gets agitated,angry and starts crying.We are worried about her negative thinkings and always keeps scolding people.Why is this so...she doesn't want to come to doctor and keeps saying she wont live for long with this health...this makes our family worry so much...she dont listen to anyone..what can we do...we are very worried and care for her so much...please help