This is probably due to the drying effects of isotretinoin. It's called cheilitis which is inflammation of the lips. A dermatologist can treat this with a skin barrier relief cream and a low strength cortisone cream.
If you missed isotretinoin for 3 days, you don't need to worry. Just resume your normal schedule. You don't need to catch up.
Yes, you can perform laser procedures on your face if you have psoriasis. We published a paper on this. Sachsman SM, Madkan V, Yamauchi PS. Absence of Koebnerization FollowingAblative and Nonablative Laser Therapy in Patients With Plaque Psoriasis.Dermatol Surg. 2016 Apr;42(4):521-5.
10 mg per day of isotretinoin is a low dosage. The dose may need to be increased to maximize efficacy. You still have a lot of inflammatory lesions. The isotretinoin will unclog your pores so that you won't need extractions.
