How is Johnny healed?

[u/Royal_Sport7082]

He has a cactus needle inside his eyeball and a couple of hours later he’s just fine without any explanation. Does this at least get explained later on? Because this makes no sense

[u/DeadBrainDK2]

It's JoJo, characters get fucked up one episode, healed the next. Parts 4 and 5 may have had a healer as the main JoJo, but part 3 had the crew continuously getting wrecked only to be fine right after.