I’ve had several questions on this blog regarding burns from hot glue guns. Unfortunately, I’ve experienced these burns myself. I found the following information on gluegunsdirect.com The best thing to do is use extra care when using glue guns to avoid burns.
Remember — A hot glue burn IS LIKE ANY OTHER BURN AND MUST BE TREATED AS SUCH!
IT IS GOING TO HURT FOR AWHILE LIKE ANY BURN!
Skin affected by molten hot melt should be plunged into cool water immediately until the burning sensation subsides or for about 10 minutes. If no tap is available, have a bowl of clean, cold water available. If coated with hot melt, move fingers to prevent a tourniquet effect as it cools. Do not remove the glue when molten, as it might remove skin to quite a depth, leaving a raw wound. Even when solid, remove with care as the above may still occur. If difficult to remove, with medical approval, olive oil can be soaked into a cotton ball and placed over the glue on skin. This will slowly soften the glue into the pad. If unsure, always seek medical attention. When hot melt is removed from skin, treat as a normal first degree burn (red, some swelling and painful), leave it alone. Vinegar may be dabbed on it for pain. Honey is also good to dab on gently to speed healing. If it is a second degree burn (blistering) dab on some vinegar, let dry and wrap lightly in sterile gauze. NEVER use butter, oil or ice on burns or break any blisters as this can cause infection.
If burn is not better in a few days or at any point that it gets worse, seek medical help.