Brief Answer:
Probable Thoracic Outlet Syndrome

Detailed Answer:
You are describing the symptoms that are commonly described in a disorder called the THORACIC OUTLET SYNDROME and the location would be on the right side (since the right arm and neck/shoulder are affected). The pain/numbness and other symptoms you have are due to the compression of nerves and blood vessels when you turn the head to the right. Squeezing the structures by that movement initiates symptoms while turning the neck to the opposite side will open the space between the 1st rib and clavicle (collar bone) and give you some relief.

If this is the correct diagnosis then, the fix is best performed by conservative measures first such as PHYSICAL THERAPY with exercises designed to try and release or reset the location of the entrapped blood vessels or nerves to a less irritated position.

Making the diagnosis does require some testing so I recommend you get some type of imaging study and an electrical study which will help confirm the anatomic relationship of the likely PINCHED nerves/blood vessels as well as a functional study such as electromyogram and nerve conduction study (EMG/NCV) in order to detect a conduction block. If it were my decision I would order an MRI and MRA of the right clavicular region along with an EMG/NCV.

The following link will show you a variety common exercises that are prescribed for people with THORACIC OUTLET SYNDROME and so in addition to the diagnostic studies I would also send you to PHYSICAL THERAPY.

https://www.pinterest.com/lisaw0019/thoracic-outlet-syndrome-exercises/

The following link is a good educational resource by MAYO CLINIC that I think will give you additional ideas and you may resonate with even more of the described symptoms that are either mild and unnoticeable to you or things that you never considered could be part of the problem since they may have seemed unrelated....such as COLD FINGERS in the right hand?

https://www.mayoclinic.org/diseases-conditions/thoracic-outlet-syndrome/diagnosis-treatment/drc-0000

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This query has utilized a total of 40 minutes of professional time in research, review, and synthesis for the purpose of formulating a return statement.

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