How Do You Tell If a Burn Is 1st, 2nd, or 3rd Degree?

derstanding the difference between burn types is important for knowing when to seek medical help. In the U.S., burns are classified into three main degrees:
First-Degree Burns (Superficial)
Second-Degree Burns (Partial Thickness)
Third-Degree Burns (Full Thickness)
When to Seek Help
1.First-Degree Burns (Superficial)
Affect only the outer layer of skin (epidermis)
Skin appears red, dry, and painful, with no blisters
Often caused by mild sunburn or brief contact with hot surfaces
Usually heals within 7 days with home care (cool water, aloe, pain relief)
2.Second-Degree Burns (Partial Thickness)
Affect both the epidermis and part of the dermis
Skin is red, blistered, swollen, and very painful
May cause scarring or infection if not treated properly
Medical attention is recommended, especially for burns on the face, hands, feet, or joints
3.Third-Degree Burns (Full Thickness)
Destroy all layers of skin and may reach fat, muscle, or bone
Skin may look white, brown, or charred, and can feel numb due to nerve damage
Medical emergency — requires immediate professional treatment, often including surgery or skin grafts
When to Seek Help:
Always contact a doctor or go to the emergency room if the burn is larger than 3 inches, deep, or located on sensitive areas like the face, genitals, or major joints.
Sources：
American Burn Association
Centers for Disease Control and Prevention (CDC)