Not only can you use it in the classic way by filling it with hot water (a third is enough), but you can also convert it into an ice pack: very useful for acute pain and local inflammation, cold is also a good veinotonic.
All you have to do is put about ten ice cubes in it, add a quarter of cold water, and you're done!
In both cases, make sure to close the cap correctly, and check the good seal by reversing the bag before use.
You can also apply a cloth between your skin and the pocket, if the temperature difference is too great.
This is the fastest way to cool a sick person.
It is an alternative to a cool bath (2 below the patient's temperature)..
It is an effective method, but often badly experienced by the patient because it is unpleasant and tiring.
Used for chronic pain: osteoarthritis of the limbs and various degenerative rheumatic pathologies (ankylosing spondylitis, rheumatoid arthritis) or neurodegenerative pathologies (MS, ALS)
On organs (liver, pancreas, stomach) for patients suffering from cancer
Used for acute pain: following a shock, or post-operative