When can you shave a leg tattoo?

I have a pretty dark piece on my knee and I want to shave and use my scrubs again!! I’ve had the tattoo for about 4 weeks and it’s starting to get warmer out! It seems mega healed but this is the darkest tattoo i have so far and I don’t wanna ruin it!

I have a pretty dark piece on my knee and I want to shave and use my scrubs again!! I’ve had the tattoo for about 4 weeks and it’s starting to get warmer out! It seems mega healed but this is the darkest tattoo i have so far and I don’t wanna ruin it!