My mother has a disease in which she reacts oppositely in two months in a year from20y.using irregular words, abusing, hate us bt normally vry lovngmom?

Mental health issue: You won't cure your mom, and with today's treatments for mental illness, it's very likely she's been treated and that these episodes reflect noncompliance. You can't force her to change unless she is a danger to herself or others. No one deserves verbal or other abuse, and you & your family's task will be to do what make all relationships successful -- set limits on what you will tolerate.