It is a beautiful poem about a mother-daughter relationship, where the mother is elderly and the daughter is a grown woman, taking care of her.
At the beginning of the poem, the narrator realises she is getting older. She has migrains. She lives with her mother.
There are quite a few lines describing her bathing her mother. Those lines reveal very much about her mother's history and her current illness, she had 6 children but now she is very old and frail. Her mother jokes about her large breasts. Her mother has diabetes.
The daughter feels weary from having spent so many years taking care of her mother.
In the end her mother performs her daily ritual of preparing tea and rice with gingered fish and pickled turnips. The narrator says that her mother knows she(narrator) can't be trusted. This means that she will not stay there with her mother forever.
The daughter admits that she is already planning to escape.