A new research has suggested that slapping a packet of frozen peas on a black eye or a sprained ankle may prevent it getting better.
For the first time, researchers have found that it could slow down the healing as it prevents the release of a key repair hormone.
It could also lead to new therapies for acute muscle injuries that lead to inflammation.
The study suggests muscle inflammation after acute injury is essential to repair.
Professor Lan Zhou and colleagues at the Neuroinflammation Research Centre at the Cleveland Clinic in Ohio discovered inflamed cells produce a high level of a hormone called insulin-like growth factor-1 (IGF-1) which significantly increases the rate of muscle regeneration, reports the Telegraph .
During the study, scientists studied two groups of mice. The first group was genetically altered so they could not form an inflammatory response to injury.
The second group was normal.
All mice were then injected with barium chloride to cause muscle injury.
The first group of mice did not heal, but the bodies of the second group repaired the injury.
When they studied the muscle tissue they saw the healthy mice produced a high level of IGF-1 in their inflamed tissue.