It isconvenient use of personal nursing ,can expand blood vessels,increase the blood
flow,relieve the symptoms and speeding up the recovery.
Bend the metal disc ,the liquid will become cryscal and heat automatically,for next
using ,only need to put it in a boiler of water with a cloth and heat until the
crystal becomes into liquid (about 5 minutes )
Reusable ,non-toxic,non-caustic