welcome to health care magic
first of all u mention ur problem whether pain is thr or any swelling in costochondral junction. if u hv sum tenderness over thr, then might be its costochondritis
. its not a big problem , totally curable, go n consult an orthopedician.
costochondritis is also cured by ultrasound
therapy that is a part of electrotherapeutic modalities in physiothgerapy.