Dragon meat

Dragon meat is a piece of a dragon's flesh, and it is bloody and green-tinged in appearance. It is put on cuts and bruises for easing the pain of the injuries. Though it is unknown if raw dragon meat is safe for eating, it can be used to prepare dragon tartare, which gives the eater bad breath.

When Hagrid returned from his trip to the giants with many injuries (actually acquired from his half-brother Grawp), he put a bloody, green-tinged, dragon meat steak slightly larger than an average car tire on his face as it helped the stinging.