Dermatologist

n. doctor who specializes in dermatology (study and treatment of skin and skin disorders)

Dermatology (from Greek δερμα, "skin") is a branch of medicine dealing with the skin and its appendages (hair, sweat glands, etc).
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Noun
1. a doctor who specializes in the physiology and pathology of the skin
(synonym) skin doctor
(hypernym) specialist, medical specialist

n. dermatologist, doctor who specializes in dermatology (study and treatment of skin and skin disorders)

(n.)
One who discourses on the skin and its diseases; one versed in dermatology.