The ruling is simple. If you can fast without hardship, go ahead. If not, skip it and make it up when are well.

I have been diagnosed of stomach ulcer some months back by a doctor from that moment till now i have had little complication but now am still not sure if I could partake, am I going to miss my gift to Allah as its said our fast is to Allah alone, am uncomfortable as I have never missed fast during Ramadan. Pleas what’s the ruling on this issue I have.