Can constipation cause pain in bellybutton like stabbing pain ? i have a hard time passing stools & if i do it's a little but hard & lumpy !

Constipation : ... Can cause mid-abdominal pain, although there are certainly many other things which can cause this type of pain also. A good first step would be to increase the amount of fiber in your diet, including increasing the amount of liquid that you drink. If this helps the constipation but the pain is still present, then you should see your primary care doctor to find out why you have pain. Good luck!