The throbbing sensation "down there" can be caused by various factors including physical, psychological, or hormonal changes. Physically, muscle spasms, nerve irritation, or inflammation in the pelvic region can cause throbbing. Intense exercise, prolonged sitting, or improper posture could lead to muscle fatigue or nerve compression resulting in this feeling. Psychologically, stress and anxiety may create muscle tension and heightened awareness of bodily sensations, which can amplify the discomfort. Hormonal fluctuations during menstruation, pregnancy, or menopause often change blood flow and muscle tone in the pelvic area, contributing to throbbing sensations as well.