How long does a lip piercing take to be permanent?

No piercing is considered fully healed until it's a year old. Contrary to what you may read, it takes the body a full year to season a piercing to the point where it can be removed for extended periods of time without the risk of the piercing closing. Light heals can occur at the 3 month period but keep in mind the piercing can still close making reinserting the jewelry difficult and hard on the new piercing. Anything less than 3 months is just ridiculous and shear nonsense. Should you have issues reinserting your jewelry, go see your local professional body piercer for assistance. Don't force jewelry into a semi closed piercing, only an insertion taper will allow you to reinsert the jewelry without damaging the piercing.