The only way to fix wavy lines is to make them thicker. Then you have to make ALL the lines thicker so they match. You’re more likely to end up with a mess than a fix. next time just find someone that can do it right the first time. People think that anyone can do simple things like this. It’s actually HARDER to do simple things like this because if they aren’t perfect, it’s easy to tell.

Hello! I just got my first tattoo just a few days over a month ago. It’s on my upper, inner thigh.    I think the bottom part looks good! The top right part I feel is just a little wavy and uneven. Obviously I’m not expecting it to be perfect and I am new to this, so I was just wondering is this something that would be fixed in a touch up session or should I just manage my expectations of it? Thanks!  

Keep looking and next time book mark it. 😉