Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain you have a Chronic Lip Split and having a history of
Dry mouth the most probable cause for split lio is due to dryness and inflammation..
Other causes can be iron and
Vitamin B12 deficiencies, lip sucking and biting habit, bacterial or funy infection etc..
It seems that you have a
Mouth breathing habit and it is the cause for Dry mouth in morning so it will be better to follow a simple trick to prevent mouth breathing.
You can stick a small vertical strip of doctors tape over the closed lips and it will enforce
nasal breathing and prevent dryness in mouth..
Apply a thick coat of Petroleum jelly over the lips..
Steroid ointment can be applied..
Cold compresses can help..
Drink plenty of water.
Apply cooled rose water over the lip with a cotton piece..
Exfoliate your lips once a week..
Maintain cleanliness of lips..
Hope this information helps..