There is a Guy Fawkes mask hanging next to Helen's bathroom mirror. Fawkes is an infamous figure in English history (an influence from Clive Barker's original story perhaps), who attempted to blow up the English Parliament on November 5, 1605. Every year the British celebrate Guy Fawkes Day by lighting bonfires and burning Fawkes in effigy.
Real bees were actually put into Tony Todd's mouth while they where shooting the climax. His only protection was a mouth guard that kept him from having the bees go down his throat.
The bees were bred specifically for this movie. They needed to make sure that the bees were only 12 hours old so that they looked like mature bees, but their stinger wouldn't be powerful enough to do any real damage.
The architecture flaw of the medicine chests and people being able to sneak in, is something that Bernard Rose discovered in his research for the film and there was actually a series of murders that were committed this way.
On the DVD commentary, Alan Poul said that had Virginia Madsen been unavailable, the part of Helen would have most likely gone to the then unknown Sandra Bullock.
Exterior, hallway and stairway scenes were actually filmed for a few days in the infamous Cabrini-Green housing projects, though the producers had to make a deal with the ruling gang members to put them in the movie as extras to ensure the cast and crew's safety during filming. Even with this arrangement, a sniper put a bullet through the production van on the last day of filming, though no one was injured.
Philip Glass was asked by director Bernard Rose to compose a score for his film "Candyman". Glass accepted and wrote a "gothic" score for chorus and pipe organ. The final version of the film was a disappointment to Glass. He felt that he had been manipulated. What was presented to him as a low budget independent project with creative integrity became (in his opinion) a low budget Hollywood slasher flick. As a result, Glass with held his consent for the release of the recordings of the score for years, until 2001.