Picture of Hip
The hip joint is the uppermost part of the leg where the head of the thigh bone (femur) fits into the socket of the pelvis. Hip pain may result from inflammation, degeneration, or injury to structures and tissues within the hip joint. Hip pain may be due to a variety of common causes including fractures, sprains, strains, arthritis, and bursitis. Pain that originates elsewhere may radiate to the hip (referred pain). Sciatica and herniated discs are two potential kinds of spinal pain that may radiate to the hip.
Text Reference: Arthritis Foundation: “Anatomy of the Hip”