Lips are quite a common piercing, mostly because they are easy to have done and heal very quickly. They nearly always require a downsize once healed as the initial jewellery needs to be long to allow for a moderate amount of swelling.
They are often done in pairs, either symmetrically or asymmetrically to give a fast healing and unique look.
Although rings can be worn in them, a straight bar is much better for healing. Care has to be taken during the healing to avoid mild aggravation.
Pain level: Low-Medium
Healing: 6-12 Weeks