Pain Relievers
Although not technically foods, many pain medications may corrode the mucus layer of the stomach. This is bad news, especially when you already have H. pylori. According to the Ohio State University Wexner Medical Center [17], aspirin and nonsteroidal anti-inflammatory drugs (NSAIDs), such as naproxen and ibuprofen, can irritate the stomach lining and increase the risk of developing ulcers.
Conclusion
There is evidence that dietary intervention can help with H. pylori infection. There is no one-size-fits-all H. pylori diet, so you should not force yourself to eat foods that make you feel unwell. Ultimately, you should consider getting antibiotic treatment for your H. pylori. Visit a doctor for a prescription.
Reference:
[1] https://www.webmd.com/digestive-disorders/h-pylori-helicobacter-pylori
[2] https://www.webmd.com/digestive-disorders/h-pylori-helicobacter-pylori
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5759180/
[4] https://www.ncbi.nlm.nih.gov/pubmed/17295419/
[5] https://pubmed.ncbi.nlm.nih.gov/15543930/
[6] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4848239/
[7] https://pubmed.ncbi.nlm.nih.gov/25779680/
[8] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4231502/
[9] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7037652/
[10] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5047973/
[11] https://pubmed.ncbi.nlm.nih.gov/22759331/
[12] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4848239/
[13] https://www.webmd.com/digestive-disorders/ss/slideshow-stomach-ulcers-best-worst-foods
[14] https://www.medicalnewstoday.com/articles/stomach-ulcer-diet
[15] http://iai.asm.org/content/81/6/2258.full
[16] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5719912/
[17] https://patienteducation.osumc.edu/Documents/avoid.pdf