I have had this dull, deep ache under my collarbone for about 3/4 years. I get it after i've been doing a lot of running. Sometimes if i massage under the front and back of my collarbone or hold my arm straight out to the side of me it relieves the pain for a little bit, but sometimes that doesnt work + it causes alot of pain + discomfort. Im 19
Does any one have any ideas that i could go off?