Accupressure is an alternative medicine which involves applying pressure to the various parts of the body to combat some diseases.
Only experienced people can tell you about the main pressure points, and sometimes even a book is prescribed for this purpose.
It is actually a chinese origin alternative medicine and it is really effective in healing eg for constipation the place right below your lips and just above your chin if vibrated with you hand continously can relive you upto some exetent.
You can try it out, it works!