Thanks for posting at HealthcareMagic.
Biting lips can be due to 2 reasons:
-Malpositioning of teeth ie: teeth are out and thus you end up biting your teeth.
If its the first case then i think you must visit an orthodontist (for Braces), so that he can treat the root cause of your problem. If its a habit then its good that you have stopped it on your own.
About the white lips, if there is any deposite which is white in colour or patchy discolouration then you may have developed a fungal infection
called candidiasis/oral thrush
for which you need to put antifungal ointments on the area locally.
If the lips have become pale, then you need to visit your physician for a blood test
to check your hemoglobin
. If the iron content of your body is low (anemia) then that can cause pale lips which needs to be treated.
Check for more white patches in your mouth, if present then that may cause bad breath but usually bad breath is because of deposits on the teeth for which a clean up(scaling and polishing) is required. For the above mentioned problems i would recommend you to visit a dentist