Amber has been used magically in every geographical region that it is found, and in most every time period. It is considered an energizer (much like dragon's blood resin or mandrake root) in that it adds "oomph" to your magical focus and intent.
Amber contains succinic acid, a natural analgesic and healing agent. Amber will warm against your body and the succinic acid will be absorbed through your skin helping with pain relief. Used for centuries, Baltic Amber has been used for a variety of ailments from teething pain to arthritis.