Brief Answer:
Question reagarding constipation in old age person. Detailed below

Detailed Answer:
Hello,
Welcome to the 'Ask A Doctor' service.
I have read your question and below is my opinion for your father case.

He is having constipation problem because he is not able to pass stool in three days.

The cause for constipation should be ruled out in such a old age person because severe jaundice medical history also given.

You need to investigate him with ultrasonography abdomen to rule out any obstruction in passage of stool if present.

If it comes normal than he is having functional constipation for which more wate, more fiber foods, laxatives or soap water enema can be given.
I suggest you consult him to gastroenterologist for detailed evaluation as jaundice is also present.

Hope this will help you.

I w'll be happy to help you further if needed.

Take care.

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