Please choose the correct ending to complete the given sentence: Health: [header] How to treat frostbite [title] Determine if you have frostnip. [step] Frostnip is not the same as frostbite, but can precede it. Ice crystals form on the surface of the skin, rather than within the tissue as in frostbite.

Ending1: Frostnip is often accompanied by coarse, brown flakes. The flakes are cone-shaped, often resembling a disc. Ending2: Frostnip presents in three places: on the instep on the foot, the inguinal opening, the rectum, and the hips. Frostbite usually develops where the muscles beneath the skin are frozen for 10 minutes, and once it develops below the skin, pain from frostbite spreads across the entire body. Ending3: While frostnip is more common (rarely absent), it can present with asthma and other conditions, such as colic and seizures, and be triggered by other conditions, such as anxiety, depression, or temporary physical side effects. [substeps] Several conditions on the body can trigger frostnip. Ending4: The blood vessels in your skin severely constrict, causing paleness or reddened areas. You may feel numbness, pain, or prickling or tingling of the area.

Answer format: ending1/ending2/ending3/ending4