I get this every now and then, and yes it was worse during pregnancy. The sure fire thing that works for me? Lots of water. Your tattoos get 'raised' when you're dehydrated. Putting creams on them will provide moisture and temporary relief, but for long term relief, you need to up your water intake. I can always tell if I'm not drinking enough (or my water needs increase, as they do in pregnancy) when my tatts become raised and itchy.

Try it - make sure you drink 50% more water over the next few days, and I reckon you should see an improvement.