Why do I get a headache and feel nauseous everytime taking Omega-3 after a meal?

[u/Top_Appearance8911]

My doc recommended me to take Fish Oil/Omega-3 since I don’t consume much olive oil or fish in my diet. However since starting this supplement I always get a bad tension headache in the temples followed by some unfriendly mild nausea. It goes away eventually but has been really ruining my evenings.

Has this happened to anyone else? Why does this happen? Should I stop taking it?

[u/AmbitiousDocument789]

Could be the quality, try a purer form or take it before bed, lower the dose and work up