A dermatologist (skin specialist) is a qualified medical specialist who has obtained qualifications to specialise in the diagnosis, treatment and prevention of skin, nail and hair diseases. Dermatologists are trained in cosmetic skin problems and aesthetic procedures. Only doctors listed as dermatologists by the Ministry of Health are recognised dermatologists. Cosmetic lasers, treatments, botulinum toxin and filler injections were developed by dermatologists.
Aesthetic doctors are not skin specialists, they are family practitioners (GPs) who need to be accredited by the Dermatological Society of Singapore to carry out these procedures. Having a diploma in dermatology (Dip Derm) or a diploma in family practice dermatology (Dip FP Dermatology) does not qualify a doctor to be a dermatologist.
Source: Dermatological Society of Singapore – How to check if your doctor is a dermatologist?