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Painless bleeding per rectum
is usually due to haemorrhoids...
It is not always symptomatic
Mucus is not / it may mean infection, infestation, ulcer, diverticulitis
and so on
Mere presence of haemorrhoids does not exclude other causes / get your examined by your doctor, preferably Gastro-enterologist... at times, endoscopy
may be necessary...
Wishing speedy recovery