frostbite anatomical infographic. flat healthcare . stages of hypothermia. skin layers and hand with finger

frostbite hypothermia hand winter health medical care finger damage icon hospital blue red illness vector flat infographics diagnosis skin layer stage symptom healthy frostnip gangrene infection inflammation superficial frostburn windburn stages extreme blistering design permanent chilblains identify redness weather detection rewarming clots cold injury fingers compartment exposure mountain safety anatomical infographic healthcare hypothermia layers deep stage dermatology