Hello sir/madam. My name is sireesha. My age is 25. I'm software employee. 6 months back my left side at one point upper back pain started. It was spread to left armpit and left chest. I get quick relief with body moments and walking. I noticed that, I am getting same pain at same areas when my sitting postures are bad otherwise I'm not getting pains. Is this due to muscle cramp or nerves weakness? Suggest me required medicine and creams. Thanks in advance.