A 14-year-old male was investigated because of a limp and a localized
sharp pain in the right lumber paravertebral region radiating to the l
ower abdomen and the medial aspect of the thigh, which started followi
ng forced physical activity. With the diagnosis of fibromyalgia the pa
tient received two perifacetal injections of local anaesthetics with s
teroids followed by transcutaneous electrical nerve stimulation (TENS)
. Following the injections, pain intensity dropped dramatically, disab
ility was reduced and muscle swelling resolved. The possible associati
on of symptoms to sport activity raises the question of sport-induced
fibromyalgia, and the excellent response to treatment may suggest a fa
cet joint irritation as possible aetiology.