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When did this start?
Also, are you on any medications for any reason?
Intermittent burning (paresthesias) in the torso, especially if it is only on one side, may indicate an early case of pre-rash shingles (pre-herpetic neuralgia) or some other cause of nerve irritation (thoracic neuralgia). Common causes include diabetes, thyroid dysfunction, liver disease, mononeuritis multiplex. You should see your PMD if this persists, or a rash ensues, and have the appropriate work-up. In most cases, neuralgias are self-limited and resolve within weeks to months.
If you had the zoster vaccine that should be protective against a shingles outbreak. That said, there are other processes that can cause inflammation or irritation in a single nerve or nerve branch anywhere in the body. It can be quite distressing, but is typically benign and temporary. If this condition does worsen, there are medications that can be used to stabilize the nerve and reduce symptoms until healing occurs (e.g. gabapentin, pregabalin).
Hope all works out for the best for you.