hello manasranjan sahoo,
i think your problem may be caused due to the drug acuret, it has an effect of causing dryness in your mouth. since you have mentioned that your acne rosacea
problem has been resolved and have stopped the medication you need not worry too much. my advice are
1.drink plenty of water as much as you can often (best medicine)
2.take vitamin and mineral rich diet such as green leaves, vegetables and fruits
3.dont let your lips dry , apply lip balms even coconut oil can be of help
1.never peel of your lips
2.never bite your lips
3.never wet your lips with saliva intentionally, it makes the condition worse.
if condition persists more than a week plaese consult a nearby doctor.