It doesn't sting, it's soothing cream. It takes away the sting.

[Shigaraki is frustrating as hell, but Dabi tries to be patient. He always is, even though he's frustrated. When Shigaraki asks him to lay there and kiss the wounds instead, he knows he's going to relent. He can read a lot about Shigaraki now, but Shigaraki also knows how to get to him too. ]

For now. But you have to stop scratching, alright? If you stop, I'll lay down with you and kiss them instead.