Our expert says:
The itching can be caused by the irritation of a nerve and may cause symptoms in the area that the nerve supplies ( see dermatome http://www.backpain-guide.com/
It could also be caused by an irritation in the lung caused by an allergy or infection.
A physiotherapist would be able to treat muscle spasms and trigger points, and your GP should examine your lungs and do x/ray if a lung condition is suspected.
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