Post menopausal bleeding has to be investigated.Hormone replacement therapy
(estrogens in your case) can cause proliferation of the endometrium and thus bleeding.
The endometrial proliferation can even lead to development of cancer.Ultrasonography
of the abdomen and/ or endometrial curettage/ biopsy
needs to be done.
The biopsy material is examined microscopically to look for changes in the endometrial lining.
Consult your gynecologist for clinical examination, investigations, and hence management.
Thanks and take care
Dr Shailja P Wahal