Empathised with your message. We need to make costochondritis more sexy somehow to attract research funding. My chest pain is aggravated by eating spicy foods and chocolate and by drinking alcohol and only relieved by ice or heat packs.
It appears some muscular neuro. separation has been working for my daughters costo. The PT actually attempts to pull apart / stretch the ligaments and muscles disrupting their "bundling" affect, which has relieved some of her pain. She will begin playing tennis again to see what happens. If it aggravates and escalates the condition / worsens it, there may be no alternative but for her to quit whats she loves to do, Tennis. Can't believe no cure for a simple inflammatory ligament condition.