The last week or so ive been getting migraines . ive noticed that they occur after i vape certain ejuices that are less expensive, are there specific ingredients that can cause this?
Vape some unflavored nic in VG, then unflavored nic in PG for a few days.
That is the only way to narrow it down.
Also, if you have never had migraines before, please for the love of god go to a doctor. Migraines may be serious or not serious, but you owe it to yourself to explore this health problem.
If you've had migraines, then perhaps you need a good allergist/immunologist who can test you for foods, chemicals, substances, etc. so you know what triggers them.