You Don’t Have to Suffer With PMS By: Dr. Loretta Lanphier, ND, CN, HHP We now know that premenstrual syndrome (PMS) is experienced by 60% of all women. What causes PMS has been difficult for researchers to pin down because each woman experiences symptoms differently. PMS Symptoms When making the diagnosis, the most important tool you can use is a chart of the cyclic nature in which they occur. If nothing is done to interrupt PMS, it often gets worse over time. You may begin by having sympto.