Prescribed omeprazole. can a build up of acidity cause pressure/bloating? also have a kidney infection with pressure in my back.

Yes pressure occurs: Hyperacidity could cause pressure in the lower chest and upper abdomen to the extent that it may act as if it is an angina pain. Bloating could occur, too. If you have kidney infection, you need to see a doctor or a nurse practitioner to get antibiotics. Pressure in the back may suggest increasing of the urine infection into a kidney infection.