Left part of stomach swells. What to do?

HELLO,   SIR, LEFT PART OF ABDOMEN???IS SWELLING WITHOUT ANY PAIN ACTUALLY EMPIRICALY YOU FEEL, BECAUSE INSIDE IS STOMACH IS ONE SINGLE PIECE, YES HALF IN RIGHT ,HALF IN LEFT. BUT IF SWELS DUE TO GAS WHOLE INSIDE STOMACH IS FULL. I HOPE MY POINT OF VIEW YOU UNDERSTAND NOW. BLOOD IN THE STOOL MAY BEDUE TO HARD STOOL. HARD STOOL DAMAGE THE ANAL MUCOSA INNER LINE OF ANUS OR RECTUM. OR DUETO INFECTION. SO, STOOL SHOULD NOT BE HARD. AVOID SPICY FRIED JUNK FOOD OR FOOD FROM OUTSIDE. STOOL SOFTENER LIKE LACTULOSE/DUPHALAC THREE TEASPOON FUL AT NIGHT TILL YOUR STOOL BECOMES SOFT N BOWEL MOVEMENT IS REGULAR. TABLET RABIPRAZOLE D BEFORE BREAKFAST N DINNER FOR THREE TO FIVE DAYS FOR GAS OR ACIDITY. PLENTY OF LIQUIDS. LIGHT DIET LESS SPICY FRIED OR SEMI SOLID TILL SYMPTOMS DISAPPEAR. ADVISE ULTRASOUND WHOLE ABDOMEN. STOOL TEST FOR COMPLETE AND MICROSCOPIC IE . OVA, CYST, PUS, MUCUS, BLOOD FRESH OR OCCULT. I HOPE THIS HELPS IN SOLVING THE PROBLEM. YET CONSULT A GASTROENTEROLOGIST ORA GENERAL PHYSICIAN M.D. AS PROPER HISTORY AND EXAMINATION OF PATIENT IS NEEDED. O.K BYE.