Heating pads should never be used by people who are:
Invalid, Infant, Sleeping, Unconscious, or Paralyzed. Burns may occur.
You should never use a heating pad if you have:
Insensitive Skin Poor blood circulation - unless carefully attended Diabetes. Burns may occur.
Is the gel from the gel heating pad and packs safe if swallowed?
Yes, but try to avoid swallowing the gel.