I too experienced this. It was very painful for months. I found relief after a suggestion from another long hauler to try Sarna, an external analgesic which was not available in Canada by that name but was available on Amazon. Instant relief. Long term results after a different post that there must be nervous system involvement for this and to ask your family doctor for a prescription for an antidepressant that calms the nervous system. A couple of weeks later and i am free of the symptoms.