Field frostbite: Low temperatures below 10 degrees Celsius to above freezing point can cause local skin and blood vessels in the body to contract, resulting in slow blood flow and affecting cell metabolism.
How to diagnose chilblain
Chilblain is a localized erythematous disease that occurs in the peripheral area of the skin during the cold season. Long term exposure to cold and humid air, as well as peripheral circulatory disorders in patients, are the main factors contributing to the onset of the disease. Lack of exercise, excessive sweating of hands and feet, malnutrition, anemia, and tight shoes and socks are also contributing factors to the occurrence of this disease.
The main causes and symptoms of non freezing cold injury
Reason:
Caused by low temperatures below 10 degrees Celsius to above freezing point, combined with humid conditions. Such as chilblains, trench feet, and soaked feet. Local skin and blood vessels in the body exposed to low temperatures below freezing point contract, causing slow blood flow and affecting cellular metabolism. When the local area reaches room temperature, blood vessels dilate, become congested, and exudate.
symptoms
The symptoms of non freezing cold injury are as follows: first, the feet, hands, and ears are red and swollen, accompanied by itching or stabbing pain, blisters, combined with infection, erosion or ulcers.
Diagnosis:
1. Season of onset
This disease often occurs in early winter and early spring, and is more common in women, children, and those who lack mobility and have poor peripheral circulation.
2. Clinical manifestations
(1) It is more common in the back of hands, feet, heels, toes, ears, and tip of the nose.
(2) The damage varies in size, initially appearing as red or purplish red congestive erythema, which fades when compressed and slowly recovers after decompression. In severe cases, there may be water damage, which can lead to ulceration after rupture. Consciously experiencing local swelling, cold, and itching, burning, or pain after warming up. After recovery, there are often atrophic scars left behind.
