A dermatologist doctor is a specialist in the diagnosis, prevention, treatment, and management of problems related to skin, nails, and hair. They also provide advice in taking care of normal skin and keeping it healthy.

You can consult a dermatologist if you have:
Severe acne
Dryness of skin
Hair loss
Scars
Fungal infections
Skin allergies
Eczema
Lupus erythematosus (an inflammatory autoimmune disease)
Psoriasis (scaly, red patches on the skin)
Ingrown toenails
Rosacea (redness on the face)
Shingles
Warts
Diagnosis of skin cancer

A dermatologist is trained for laser treatment of skin problems. Hence, a dermatologist can be consulted if you wish to do laser treatment for problems such as reducing scars or wrinkles, removing unwanted hair, tattoos, or skin discolourations, decreasing acne, improving the tone of the skin, and restoring skin collagen.

There are the following specialisations in dermatology:
Dermatopathology - expert in skin pathology
Immunodermatology - expert in skin diseases involving immune system
Pediatric dermatology - specialises in children's skin conditions
Cosmetic dermatology - expert in cosmetic surgery
Mohs surgery - removal of skin cancer
Teledermatology - expert in using various media to provide medical information

A dermatologist can treat skin problems in kids. However, there is a specialisation in dermatology known as pediatric dermatology wherein the doctor has experience and qualifications for the treatment of medical conditions of children such as hereditary skin diseases, warts, birthmarks, and acne.