What should you know about DEXA scan age to start?

Routine screening is usually discussed around the stage of life when bone loss becomes more likely, but targeted testing may be useful earlier. Examples include a fracture after a minor impact, premature ovarian insufficiency, prolonged steroid use, low body weight, smoking, heavy alcohol use, or a condition that affects calcium or bone metabolism. A clinician may also request a scan before choosing treatment or to provide a baseline for monitoring. The result is interpreted against an age- and sex-appropriate reference group, not as a simple pass-or-fail test.

At a consultation, share your fracture history, medicines, menstrual or hormonal history, family history, and any condition affecting nutrition or absorption. Ask what question the scan is meant to answer and whether a blood test or medication review comes first. Before scanning, mention possible pregnancy, recent contrast imaging, or metal implants. Keep records of earlier reports because consistent sites and equipment make later comparisons easier.

Seek prompt medical review after a low-impact fracture, persistent back pain, unexplained height loss, or repeated falls. Urgent assessment is needed after a serious injury or when back pain is accompanied by leg weakness, numbness, or changes in bladder or bowel control. These situations require clinical examination even if a DEXA referral is already planned.

Ask whether you need screening or targeted testing, which risks change the timing, what the report could alter in your care, and when a repeat measurement might be useful.