Partner having issues

Sydney

So my SO has had this issue where he will go a week or so every month, for the past 2-3 months, with eating maybe once a day, and whenever he wakes up in the morning, he dry heaves or throws up stomach bile, Ive asked him to go to the doctor to get checked out to see if anything is wrong, but he refuses to.

Has anyone else experienced this that could tell me what it could possibly be.

Thank you!!