First degree or superficial burns :-
It is commonly seen with a sunburn. It is usually red and blanches (becomes white) on pressure. It occurs due to damage to only the top (epidermis) layer of the skin. It heals by itself in 3-6 days and generally dose not require hospitalization.

Partial thickness burns or second degree burn :-
It involves the entire epidermis and some portion of the dermis. They are of 2 types:-

Superficial partial thickness burn :-
They are painful and associated with blisters. They heal within 3 weeks without any visible scars. There may be some pigment changes.

Deep partial thickness burns :-
They are dry white in color. They may cause scarring and take longer to heal. Skin grafting is usually required for healing.

Full thickness burns :-
They involve the entire epidermis and dermis. They are dry and leathery in appearance. They cause scarring and require immediate skin grafting and use of compression garments.