Constipation and difficulty in urination in an 86 year old man?

Urinary retention. Constipation makes it difficult for older people to empty their bladder. Sometimes their bowels are impacted. This elderly man may need an enema. He certainly needs a laxative. He may also have an enlarged prostate gland which makes this problem even worse. Treating the constipation may help the problem with urination. He should see his doctor.