Rosie, im a 50 yr old irish woman with eds hypermobility , ive had a spontaneous sternoclavicular subluxation for over 20 years. i use a figure of 8 back brace to stabilise the joint when it pops, it heals somewhat for a year or rwo and then pops again, i have pursued orthrapaedic surgeons in ireland and they are afraid of it and will not investigate the injury. It is rare, every orthro ive met , ive had to educate about it. i have a special file i bring with me for them(!) its a debilitating injury, incredibly painful if the muscles are allowed spasm if not treated and will cause more subluxations(by the pressure of the spasams) in the neck if left alone.
a back brace and kino tape and physio are the best treatments ive been offered in ireland.Id be very glad to see physios discussing this more widely.

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hi, id go with the tape, the ligaments need time to heal and if the tape is keeping the collarbone in the right place then that helps. your daughter should see a doctor though. there can sometimes be more serious complications depending on which way it dislocates, front or back.