This is Dr David
yes. gastritis can cause pain and any pain can cause elevation of blood pressure.
hopefully you can get your gastritis under control with stomach acid lowering medications like nexium or protonix or zantac or maalox or mylanta
once your gastritis is better you should get your blood pressure checked again
if your blood pressure is more normal, you may not need long term high blood pressure medications
avoid excessive salt intake which can also elevate your blood pressure levels.
let me know if you have other questions.
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