Having diarrhea is definitely no fun. Needing to run to the bathroom every few minutes can make you feel self-conscious, and you probably don’t feel like eating much or doing your favorite activities.

Dear Dr. Gott: Please comment on the treatment of diarrhea. I am 86 and cannot get much help from my doctor. Dear Reader: Tomes have been written about the causes and treatment of diarrhea, a subject ...