I know this is a spam bot, but just for the fun of it:
No
It's not particularly severe usually. Gastric irritation is far more severe and common as it can lead to bleeding of the stomach lining and ulceration
I obviously deleted the link in question. However if you are getting persistent GORD (gastric oesophageal reflux disease) then you should consult a pharmacist/doctor.
I think I bossed that :)