A white bump or formation in the tooth socket after a tooth extraction is usually granulation tissue, which is a normal part of the healing process. Granulation tissue is made up of blood vessels, collagen, and white blood cells, and it forms about a week after the extraction. It’s fragile and helps protect the blood clot that forms in the first day to stop bleeding, and it also helps fill the site and prevent dry socket. Granulation tissue will eventually go away on its own, and you shouldn’t touch or pick at it. You can keep the area clean with salt water rinses after meals to help your body heal without infection.