More than half of women over age 50 can expect to develop varicose veins, says Dr. Renu Sinha, a Rockwood Clinic surgeon. Sinha will discuss the prevention, causes and treatment of the common condition during a seminar Wednesday in Spokane. Varicose veins and spider veins can cause discomfort, swelling and leg fatigue, said Sinha, whose presentation is part of HealthTalks, a series of discussions that has continued in the community for 17 years.