Osteoarthritis: This is a common condition, especially in older adults, characterized by wear and tear of the joint cartilage, leading to pain and stiffness in the hip.

Trochanteric Bursitis: Inflammation of the bursa over the trochanter, often caused by repetitive friction or direct trauma, leading to pain on the outer aspect of the hip.
Piriformis Syndrome: Compression of the sciatic nerve by the piriformis muscle, causing pain, numbness, and tingling in the hip and down the leg.
Hip Fracture: A break in the hip bone, which can be due to osteoporosis or trauma, presenting with severe hip pain and difficulty walking.
Tendinitis: Inflammation of the tendons around the hip, often due to overuse or repetitive strain, causing pain and stiffness.

Septic Arthritis: A bacterial infection within the joint, which is a medical emergency requiring prompt antibiotic treatment to prevent joint destruction.
Avascular Necrosis: Death of bone tissue due to lack of blood supply, often related to steroid use, trauma, or excessive alcohol consumption, which can lead to collapse of the bone and severe pain.
Osteomyelitis: A bone infection that can spread from adjacent tissues or through the bloodstream, requiring aggressive antibiotic treatment.

Synovial Chondromatosis: A rare condition where cartilage grows within the synovium of the joint, leading to joint pain and swelling.
Paget's Disease: A chronic bone disorder that can result in enlarged and misshapen bones, causing pain and deformity.
Bone Tumors: Both benign (e.g., osteoid osteoma) and malignant (e.g., osteosarcoma) tumors can cause hip pain, though they are less common than other diagnoses.