Severe adult lip lickers dermatitis treatment?

Healthy lips. I recommend pangea organics lip balm. It has natural certified organic botanical essential oils that heal the skin on your lips without drying them out or exposing you to petroleum or other harsh or dangerous chemicals.
Stop Licking lips. This is very difficult to treat unless you can stop licking your lips. It is often a tough habit to break! you can treat your lips with aquaphor healing ointment or vaniply ointment. They are very soothing and help to keep moisture in your lips. If you cannot control it, visit your dermatologist who can prescribe topical medicine for you.
Vaseline. You may try vaseline or aquaphor, and apply after every time you lick your lips (and, of course, try to stop licking the lips).