Thanks for writing in .
I don't think there is anything to worry, if your bowel movements have been that way for many years. However---once in 3-4 days is a pretty long time...water might get more absorbed from the stools resulting in hard, dry, small clumps of stool.
However, to allay your fears you might want to visit a physician/ gastroenterologist.
In the meantime, follow a healthy lifestyle:
Avoid oily/ fatty food.
Regular exercise 30 minutes a day for 5 days a week.
Good fibre rich food, plenty of fresh fruits and vegetables.
Drink 8-10 glasses of water daily.
Avoid maida, white bread and refined food products. Switch to whole grain cereals like brown rice, whole wheat bread/pasta, oats.etc.
As soon as you wake up in the morning drink a glass of warm water and then visit the toilet. Warm water might set in the peristalsis
and get the bowels to do their job effortlessly.
I'm quite hopeful with the above measures, you should pass motion every day / atleast alternate days with the desired bulk.
Hope this helps.
Dr. Divya Kuttikrishnan