How long does it take gums to heal from a scaling?

It depends on how: inflamed/infected they were before the procedure, if antibiotics were prescribed. Full healing may not occur for 6 to 12 weeks.

Deep cleaning: You are likely talking about post operative discomfort. It all depends on how bad your gum disease is. Typically, most of my patients are back to normal in a few days and only need some Ibuprofen or Tylenol (acetaminophen) for pain. Some people are better the next day and some take up to a month. The latter being very unusual. Warm salt water rinses a few times a day will help. Hang in there

7-14 days: Recovery from the discomfort of the cleaning should occur within 7-10 days. Keep a good oral hygiene and use NSAID OTC or Tylenol (acetaminophen) for pain control.