Is masturbating 3 or 4 times a day heathy or is it bad.?

No. No evidence masturbating is bad for your health. Children all the way to elderly do it. Some more than others. It is not a psychiatric or medical disorder.
Sounds like a lot. 3-4 times a day sounds like it might be taking up too much time. its one thing to have an odd day where you masturbate 3-4 times, but 3-4 times every day sounds like a lot. what is your relationship with pornography? if you continue at this pace please use a water based lubricant and tend to any skin irritation.
Bad. Not like physically bad for your health but leaves little time for a productive lifestyle which will almost certainly add to the risk of psychological imbalance.