Hi sgupta,
After Sanae treats my chin, the area is a little red and slightly bumpy. I assume it’s just tiny swellings. The redness and bumpiness goes down within 1 or 2 hours. I never had any white pimples after treatment, although I hear it’s a normal reaction. Unless you are prone to breakouts, the pimples should disappear pretty quickly.
Don’t forget that electrolysis in effect damages the hair root and surrounding area, and the skin eventually pushes the damaged tissue out to the surface… kind of like the skin purging out a splinter. It’s the natural healing process. Perhaps your pimples are related to that.
Personally, I don’t do anything special to the treated area. I don’t use makeup or creams. Sometimes I’ll use olive oil as moisturizer, but not on treatment days. On treatment days I don’t put anything on my skin before or after the treatment. Sanae usually applies some soothing gel after treatment, but otherwise I don’t mess with my skin for the next day or two.