Swollen weeks after electrolysis on chin

I have done multiple sessions of electrolysis on my chin, and noticed that weeks later swelling is still there especially on one part, has anyone else experienced anything like this? My tech says it’s normal and maybe because I have sensitive skin, but I’m getting a little worried, any advice is appreciated,

You don’t provide enough information to make judgment on your situation. How dense is the hair in chin area? When you say multiple sessions were done on the chin that’s how many hours and were these appointments done closely together or spaced out to every other day, 2 times a week or 12 days in a row etc?? How much time has passed since your last treatment? How many weeks of swelling are you experiencing? Have you noticed any improvement in swelling or it’s been the same for weeks?