Tongue piercings are a very easy piercing to get and heal quite fast due to the vascular nature of the tongue. They can be done either centrally or in multiples either through the center or sides.
Downsizing is required after 4-6 weeks once the swelling has gone down. Eating can be a tad uncomfortable during the first week however through correct aftercare doesn't have to be painful.
Pain level: Low
Healing: 4-12 Weeks