A 29 year old female recreational runner presented with two separate e
pisodes of hip pain. The first, affecting the right hip was an uncommo
n cause of hip pain - an osteoid osteoma. The second, affecting the le
ft hip was a more predictable cause of hip pain in a runner - a femora
l stress fracture. Management of the subsequent stress fracture enable
d more detailed and prolonged observation of the natural history and c
linical course of the osteoid osteoma. The presentation and management
of each of the conditions is discussed.