Dr. Jodie Schultz
Also, it could be that you broke your collar bone (clavicle in doctor talk) years ago and it did not heal properly.
Barring those two issues, it is a biomechanical problem (how your joints and muscles work together) from working one side harder than the other, postural issues due to ergonomics (how your desk and computer is set up) of your work place or an injury from years ago.
I recommend a proper examination by a chiropractor to diagnose what is going on and correct it. Over the years this imbalance could lead to arthritis in that shoulder.
Dr. Philip R. Schalow
Two types, 1. functional or 2. structural. Usually ruled out with xrays and orthopedic text.
Correction depends on the degree of curve. 10-15 degrees still a chiropractic patient. Beyond that I would refer to orthopedic physician to monitor curve and determine plan of care.
Most people will notice one shoulder, hip higher than the other. Some rib humping, clothing not even when wearing.
IE: shirts, shirts, etc.
If its ruled out, no scoliosis. I would modify your work out routine. Strengthen the opposite side and stretch muscles on dominate side.
Most likely it is not a growth problem. It could be several things, but your rib cage could be off center causing one side to appear broader. Are you left handed or do a day to day activity that causes you to use your left shoulder more? That could cause extra muscle built on that side.
I would really have to do an evaluation to see it there was any cause for concern, but most likely it is nothing to worry about.
Nobody is perfectly symmetrical, however, many times having a series of gentle chiropractic and PT visits will improve postural imbalances.
Melissa Perotti, DC