How long a chemical burn takes to heal depends on its severity and the substance that caused it.
- First-degree burn: Generally heals within three to six days. After one or two days, the skin can lightly peel.
- Second-degree burn: Healing can take over three weeks. This severity of burn affects the skin’s top layer and a portion of the layer beneath it.
- Third-degree and fourth-degree burn: Multiple weeks or months may be needed to heal this burn. Severe burns can require a skin graft, a procedure in which healthy skin is attached to the damaged area to help with skin repair.