If the bleeding in motion is associated with pain in the anus,it might be Fissure in Ano
.If it is not associated with pain,it may be Haemorrhoids(Piles).
Cysts near the Uterus
may be in the Ovary,but they are usually painless unless they undergo Torsion.
Consult your Doctor and get your mom examined Per rectally,which diagnoses the cause of bleeding.