thank you for the response, i'll go and see a doctor.
Hello,
Lip turning red or pink can be due to contact dermatitis or an allergic reaction. I recommend you see your dermatologist for proper treatment, as that may combine an anti-inflammatory, antibacterial and anti-yeast meds and that you use just plain petroleum jelly for moisturizing. This is particularly important right before bedtime.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.