I also have heard it could be that I put too much aquaphor on it and I clogged my pores. Not sure what to think

Help! I got this tattoo 3 weeks ago and as of 4 days ago I’ve gotten this rash. It doesn’t hurt, but it is itchy. Not sure if that’s from healing. Anyone have advice or have ever had this happen?! Not sure what to do. I have other tatts but this never has happened. 

Thanks! It's interesting how some artists suggest keeping showers minimal or not using direct spray at all and other suggest blasting the new tattoo with hot water for 5-10 mins. I've even heard of taking a hot bath immediately after. I believe it's a traditional Japanese method?