Q magnets are often attached with sports tape, but some people with sensitive or hairy skin or just for convenience sake, may prefer a type of brace.
Q magnets are a magnetic field gradient generating medical device and provides the user with an optimized design based on extensive research and feedback. Even so, the magnetic field of a static magnet dissipates very quickly and the effect is highly localized. If you do not select the right Q magnet model for the right target tissue, then there is very little chance of a therapeutic effect.
So selecting a magnetic device with an optimised design, with the right field characteristics and placing them correctly so that the penetrating field envelopes the offending target tissue are variables requiring the correct answers otherwise there will be very little effect.