Forest S. Tennant Jr. is an American physician, writer, businessman, consultant, and former mayor of West Covina, California. Tennant has earned recognition as an expert in pain management and substance dependence and has also been involved in some controversies. Currently, the physician's focus is on researching and developing new treatment protocols for Adhesive Arachnoiditis, an incurable inflammatory condition that is one of the toughest to treat in the pain management field.