The doctor warned yesterday that reaching out for a bag of frozen peas or chips to treat the injury could lead to a serious freezing injury.
Applying vegetables from deep freezing can cause permanent skin damage and even require skin grafting, they say.
The British Journal of Sports Medicine reported that a PE teacher needed emergency treatment after he fell asleep with a bag of frozen potato chips on his right foot.
She had been unwell for four weeks before she looked calmly at the issue.
But after applying the potato paste, she slept for at least 40 minutes.
Although the pain disappeared for a few hours, the next day her feet became discolored and sore and her toes lost their feelings. The 42-year-
The old teacher was sent to the hospital and she needed surgery to remove the infected tissue before undergoing skin grafting.
Her two toes had permanent nerve damage.
Colin Graham of Glasgow Southern General Hospital, who wrote the article, said: "Patients are aware that the application of ice is a useful way to relieve pain after acute soft tissue injury.
It is clear that she does not know the danger of using ice for a long time.
He said: "Extreme cold can anesthesia the skin, making it difficult for patients to be aware of the damage that occurs under the skin.
The sports medicine licensed physical therapist Association has issued guidelines suggesting that ice bags should be used for up to 30 minutes and a wet towel should be placed between the ice bag and the skin.
In areas with little fat or muscle under the skin, they should be used for no more than 10 minutes.