Hi.
Bleeding from anus will be due to many causes,but commonly from Piles (Haemorrhoids) &
Fissure in Ano.
If the bleeding is associated with pain in the anus,it may be due to fissure in ano.
Bleeding from anus while urinating may also be due to piles.
But,the diagnosis will be confirmed by your clinician by clinical examination.If he has doubt,he may ask for
Colonoscopy and
Ultrasound abdomen.
Ultrasound may also give a clue to
Stomach upset and
nausea.If it doesnt conclude,then you may have to go for Upper GI
endoscopy.
But,everything has to done under the guidance of your Doctor.
Hope everything will be alright.
All the best
Regards