Depends. Depends on what kind of work you do, where it was lanced, how large it was, and if there were any complications or surrounding infection. Some I send the next day, some weeks later.
Depends. Depends on location of abscess. As long as you have it properly bandaged, you should be able to return quickly. Also depends on if your work will interfere with the healing -- for example : will your job cause undue pressure on this area, or cause rubbing against it. If not sure, call your md.