Do you have any other symptoms with your persistent vomitting?
There a few reasons why someone would vomit persistently. As you a male then you are definitely not pregnant - that can cause persistent vomitting during the first few months of pregancy in some women.
If you have enteritis (food poisoning. From eating contaminated foods and water as well as from alcohol poisoning.
If you have infections from ears, throat, migraines, kidney and, gall bladder problems that too can cause persistent vomitting until treated.
Another reason is self induced.