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It seems you are suffering from Acute Muscular Pain. The Muscular chest pain aggravates with movement. It is dull, diffuse and continuous in nature. This can result from incorrect posture during the night while you were sleeping. However, in case you have any pain in upper part of abdomen, or you had consumed alcohol in case last night, you would require to get an Ultrasound Abdomen to rule out any evidence of Gall Bladder stones or Alcohol-induced Pancreatitis.
For muscular pain you should do hot fomentation over the involved area 3-4 times a day. You should apply Diclofenac Gel locally over the involved area. To take anti-inflammatory and analgesic pain killer like Ibuprofen, Etoricoxib if the pain is very severe.
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