Are you talking about icing?
If so, yes. There are several studies supporting not icing acute injuries.
Again, it’s just starting to catch on, but it seems it does not help, and may indeed hinder the healing process.
There are certainly times to ice, but in most cases, it’s probably not the way to go. If you just want to relieve pain, go for it.
Think of it this way. When there is an injury, your body is reacting with swelling for a reason. One, it is trying to heal the injury. Two, it can act as a natural splint. Evidence suggests that swelling does not cause any range of motion loss after the swelling is relieved.
Again, I’m not saying there is never benefit to icing, but I can say with confidence, there is a better way to treat acute injuries than we’ve been doing it forever.
I would make the analogy of eating fat. Several decades ago, people decided that eating any fat caused heart attacks without any actual evidence. I can assure you that eating two loaves of Wonder Bread everyday is is going to clog that heart up a lot faster than eating 5 avocados everyday.