Depending on how bad the frostbite is, soak whatever is frostbitten in warm water, try massaging lotion onto the area so some of the swelling will go down, and see a doctor asap.
NEVER rub the frostbiten area it may cause damage to the nerves. Give them room temperture water and set them near a fireplace.
Apply garlic oil to the infected area to prevent or help heal infection.
Soak mullein flowers in olive oil for fifteen minutes and apply to frostbitten area.
Take garlic in capsule form or fresh to prevent or help heal infection.
Consult a physician for serious cases of frostbite.
Drink lobelia extract in water for pain.