You did not include the name of the implant used in your question. In case the question concerns a contraceptive implant (e.g. Implanon NXT), which suggests the rest of the query, please read on. Common side effects reported with the Implanon NX contraceptive implant m.in include abdominal pain, nausea and bloating. Uncommonly, e.g. diarrhoea, vomiting, constipation have been reported. In people with gastritis through the listed side effects of the implant, the symptoms of the digestive system may increase. If you feel the symptoms of gastritis intensified, I encourage you to consult a doctor. You may need to remove the implant in your case. You can also use the teleadvice offered, m.in. by the Gdziepolek.pl portal: https://www.gdziepolek.pl/telekonsultacja I also encourage you to report the occurrence of side effects of the implant. Reporting adverse reactions allows you to increase control over medicines available on the market. We wrote more about how and why to report side effects in the article: https://www.gdziepolek.pl/artykuly/jak-i-dlaczego-zglaszac-dzialania-niepozadane I enclose a link to check the availability of the implant and make a reservation at the selected pharmacy: https://www.gdziepolek.pl/produkty/37472/implanon-nxt-implant/apteki I encourage you to read additional materials that may be useful: https://www.gdziepolek.pl/artykuly/czy-bac-sie-dzialan-niepozadanych-lekow https://www.gdziepolek.pl/artykuly/antykoncepcja-hormonalna https://www.gdziepolek.pl/kategorie/leki-na-zapalenie-zoladka