I have black dots in face and neck. Consulted dermatology and her response is, this dot is due to hereditary. Please advise is there way to reduce it?

Depends what it is. "Black dots" on the face can be various things. They can be moles, freckles, sun damage, black heads, or seborrheic keratoses. Freckles and sun damage can be treated with a laser. Black heads can be treated with acne medication. Seborrheic keratoses can be treated with electrodessication or liquid nitrogen. I would recommend asking a dermatologist about the best treatment options for you.