Sometimes healing can delay, especially if many hairs had been removed.
A few years ago my a series of treatments i did was the cause surpisingly massive healing delays despite extremely small energy levels of about 58 ELs with a Platinum and a .002 probe. It took a while until i had sufficient feedback from my cleints allowing me to track that down: the timing was too short, only 0.05 secs, and that must have lead to tiny local overheatings which took long to recover. But on the long run everything healed perfectly.
Judging just from Your description i would let it heal. I would, of course, not do any electrolysis on that spot until it has healed perfectly, and i would give feedback to the practitioner.
You can, of course, apply the usual aftercare, but don't do too much!