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Regarding your question,

what is the treatment of gastritis

1. as a start for mild and moderate gastritis antacid is enough to relieve the symptoms
2. stop any NSAIDs drugs that are taken for pain killing as ibuprufen or diclofnac
3. in case of sever gastritis or the symptoms didnt relieve by antacid a PPI drug such as lansoprazol orH2 antagonis as famotidine is useful
4. for H.pylori eradication a triple regimn for 14 days by giving metronidazol and clarithromycin with lansoprazol 
5. endoscopic banding or laser therapy applied at the site of the ulcer

what are the causes of gastritis

1. H.pylori bacterial infection that lead to peptic ulcer
2. excessive use of NSAIDS Drugs
3. very stressful situation as post major surgery or major trauma
4. after bariatric surgery that done for weight loss as sleeve and banding
5. excessive intake of spicey food some studies said it is a cause

what are the symptoms of gastritis

1. Nausea
2. Vomiting could be coffe ground due to bleeding
3. Bloating
4. Early full after eating even small meals
5. Loss of appetite
6. Unexplained weight loss

what are the method to diagnose the cause of gastritis

1. clinical exam
2. CBC
3. Stool analysis for h pylori antigen or blood
4. endoscopy as last resort it is both diagnostic and theraputic method

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