I am 19 years old man and I done laser surgery on my cheek for mole on face before 2 year and I have scar on face where I done surgery my doctor suggest tretinoin 0.025% cream for scar to generate skin but after 1 year of use my lips is to dry and peel and skin around the surgery area is too dry and skin is peeling and look white film when contact with water even the scar not gone what I am do pls suggest any treatment.