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Всё зависит от контекста: если это листовка в поликлинике, то вот Вам вариант 1: "На морозе онемение и жжение - первый признак обморожения!" :-)

то же самое: обморожение первой степени

Переохлаждение - предупреждение, которое может привести к обморожению, а вот тут уже степени 1 (лёгкое), и до 4 степени.


Most often observed at the end of the nose, tops of the ears or possibly fingers. The skin goes an unnatural looking "pasty white" color and loses sensation. This is caused by a lack of blood flow to those regions because they are losing so much heat. Frost nip is an early warning sign that if left will lead to frostbite. It can be readily corrected however by putting on extra clothing. The skidoo gloves I used in Antarctica had a large patch of sheepskin on the back to hold against and warm up any frost-nipped parts. The important thing with frost nip is to keep an eye on your companions as it is so easy to miss it on yourself.
http://www.coolantarctica.com/Antarctica fact file/science/c...

You can help prevent frostbite in cold weather by dressing kids in layers, making sure they come indoors at regular intervals, and watching for frostnip...
http://organizedwisdom.com/Frostnip-or-Frostbite-Treatment/w...

Frostbite and Frostnip
medical-dictionary.thefreedictionary.com/Frostbite+and+Frostnip

www.tiensmed.ru/news/obmorojen-pereohlaj1.html