Directly warming cold hands on a radiator or under warm water can be harmful.
When exposed to cold, blood vessels in your hands constrict to preserve body heat. This natural physiological response can make your hands feel cold. However, sudden exposure to high temperatures, such as those from a radiator or warm water, can cause further damage.
When hands are suddenly exposed to warmth, it can lead to a condition known as chilblains. This occurs when blood vessels are unable to adapt quickly to temperature changes, causing redness, itching, and swelling. In severe cases, blisters may form.
Additionally, rapidly warming cold hands can result in pain and skin irritation. It is advisable to gently warm hands by using lukewarm water or by rubbing them together, allowing the blood vessels to gradually adjust to the temperature change.
While it might seem logical to use a radiator or hot water to warm cold hands, doing so can pose risks. Opt for gradual warming methods to ensure safety and comfort.
Source: Weather