I've been taking Swanson's Pristine Norwegian Cod Liver Oil for just a few days (3 caps a day, a relatively small amount). One the 2nd day I started breaking out, which is rare for me. The product seems high quality, if I chew the capsules they don't taste bad at all. Ironically it is promoted for skin health.
In the past I noticed cystic Acne after taking omega 3 fish oils.