What Causes Radiating Muscle Pain In Right Shoulder And Calf Muscle?
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Detailed Answer:
I read your question carefully and I am sorry about the symptoms you are feeling.
From what I understand the symptoms are localized in only one half of your body, without affecting the left side. That makes rheumatological, hormonal, metabolic causes for your symptoms less likely and indicates a neurological origin.
One possible cause may be Parkinson's disease. It commonly manifests with tremor which in the first few years is often limited to one side. Pain is a less common symptom, but present in many patients, along with rigidity and slowing of movements.
Another possibility would be a brain lesion in the left, like a stroke or tumor, or from compression of the spinal cord in the neck region which may cause painful spasticity as well.
For that reason I believe a neurological consult is the first step to look for signs of Parkinson's and other conditions of the same group. After wards MRI of the brain and cervical spine would be the initial appropriate tests.
I remain at your disposal for further questions.