I cannot predict how many treatments you will need for your chin because I don’t have the advantage of seeing you. Even then, we electrologists don’t like to give time parameters because there are too many variables to deal with and we could be left with egg on our face. Generally speaking, with consistent treatments, we need to get through at least three hair growth cycles. That represents at least 9-12 months of treatments. One or two appointments will not end your problem, however, GENERALLY SPEAKING, after 6 or 7 treatments, you will look much better and may not have to do temporary measures to diguise your problem.
In the beginning, you have frequent treatments, perhaps every week or two and then as we gain ground, the time interval between appointments is longer and the session visit is shorter.
No tweezing!!! once electrolysis or laser treatments begin because you disturb the hair growth cycles. Both modalities need a hair to treat, preferably a active growing hair. If the hair is tweezed or waxed, there’s nothing available to kill for weeks. You will prolong your treatments if you interfer with the hair growth cycle, so back off with the tweezers!
I think for an area like the chin, I would consider electrolyis, but do get several consultations for which ever method you choose.