Muscle knots in the Posterior Portion of the Gluteus Minimus are located deep in the upper outer buttock and hip. These muscle knots often refer pain in a sciatica-like pattern, radiating from the buttock down the back of the thigh, behind the knee, into the calf, and sometimes even reaching the ankle. The pain is usually a deep, aching sensation that can be aggravated by walking, standing, or lying on the affected side, and is often mistaken for nerve-related issues.