Welcome to HCM
Dear Friend Did your physician found lump in your stomach ? Lump may be a Hernia
which can cause obstruction to pass motion freely . Many a times it leads to infection in later stage , I advice you to Consult a Surgeon because your swelling gets inceased due to straining during passing motion.
Add fiber rich diet or Laxatives to prevent straining.
Right abdomen pain can also be due to constipation
and irregular bowel movements.
Wishing a Speedy Recovery.