I just want to share my story, since a lot of information about electroysis on the internet is posted by salons, spas, etc. who provide these services, and therefore, are slightly biased.
I used to get my upper lip waxed every 3-4 weeks. About 7 months ago, I started doing electrolysis instead. I completely regret doing it. After the very first time, there was significant redness and swelling. I thought it was just temporary, so I continued weekly treatments, and just used a lot of coverup. The redness eventually went away, but now there appears to be permanent discoloration of the area. I was never self conscious of my lip area (when I used to wax), but now I cringe everytime I look in the mirror, and see that "shadow". To make things worse, the pores in the upper lip area are significantly larger.
I had been going to a highly recommended licensed technician (was voted one of new york's "best"), so I dont think it was due to poor technique. I just think they dont tell you about these side effects, since it may scare off a lot of potential clients. The hair has lessened but it's not fully gone. Overall, I definitely regret doing this.