How to get rid of armpit pain that aggravates by touch and movement?

Hello doctor,

I have been experiencing pain in my right armpit for about two months. I did an ultrasound, MRI, and CT and they did not find anything abnormal (no lymph nodes, cysts, or lumps). I did a breast examination and it is normal. I experience pain when a particular point in the armpit is touched or while moving my right arm, especially in certain positions. About two months back, just before the onset of this pain, I had a very strong acid reflux episode that I have never had before. I had continuous burping, a sense of nausea, a sour taste in the mouth, and a feeling of emptiness in the stomach which may be due to prolonged use of NSAIDs. However, the reflux went away after 10 days. Is there a possibility that some form of reflux has remained silent in me and that the armpit and pectoral pain are due to this? The only manifestation that I have now is a slight meteorism, but I do not know if this is a part of the symptoms of reflux. I have burping sometimes, but not as strong as it was two months back. Should I take something for the acid reflux and see if my armpit pain gets better? What could be the cause?

Kindly help.

Hello doctor,

Thank you for the reply.

Your suggestion was very precise. I will start using vitamin B12. So from your review, I understand that it is probably not related to the acid reflux episode. It might be related to some ligament or tendon. I have already done an osteopathy session thinking that it might be related to tendons. I have gone on a trip in the car two months back. I do not know if staying in the car for three hours would have caused any nerve-related issues. If it is a neurological problem, is there any test that could prove that? Would this symptom eventually go away? I am worried that it is a neurological issue and I feel neurological issues are very complex. What would be the best solution?

Kindly help.