I am not a regular poster on here these days, but I have had a lot of electrolysis done on my face, and in every case, I've been able to go to work the next day. The scabs I have developed have been mostly on my abdomen - and I don't touch them or itch them or scratch them (they will fall off on their own), and I apply aftercare solutions (in my case tea tree oil and aloe vera, and I followed my electrologist's recommendations).
There have been great pictures posted of what a "normal" reaction might look like and what overtreatment might look like. In reality, it will vary from one person to the next. Know your own "normal".
If you go to a new electrologist and you look like a dalmatian the following day, it may be that you've been overtreated - you can post pictures here for expert eyes to see.
Whatever you do, make sure there is constant feedback between you and your electrologist - you must show her (or him) any pictures of abnormal scabs right away (don't wait on it!) and (if necessary) adjust treatment accordingly. In some cases, it may just be your body's natural reaction, but I have seen some pictures where it might be too much treatment energy. When I finished my very first 4-hour session, I sent a panicked e-mail (complete with pictures) to my electrologist because I got some scabs - not large ones, but they were certainly there.
Be vigilant. If you've had many sessions without incident and you suddenly develop some odd reaction, don't let it go away. A few months ago, after many sessions without any incident, I had one big "scab" on my chin. It looked like a pus-filled wound. I noticed it because I was paying attention to the skin's reaction. It turns out it was a big ingrown that eventually came out. More than anything else, you should keep in mind that many people out there are having (and have had) electrolysis without having to wear a burqa the next day.
I am now convinced more than ever that if I have been able to remove the tough, banana-shaped hairs that I had with my skin emerging more-or-less intact, then you, too, should not have to resemble a dalmatian just because you're getting electrolysis.