Left shoulder and neck muscles continuously hurt and can't seem to get any relief. why is this happening to me?

There are many..l.: ...Many reasons why this could be. The first step is to go to your physician to be properly evaluated. Neck pain is no fun. Get checked out, and good luck to you.

Time for doc eval: In a patient your age, this is often due to myofascial dysfunction- meaning strained, inflexible and restricted soft tissues in your area of pain. Often seen in young women who do a lot of reading, typing, desk & computer work. X-rays can evaluate the cervical spine and shoulder. Physical therapy, stress reduction, trigger point injections & improving posture can be helpful for myofascial pain.