Have an acute inner chest pain when i inhale diagnose?

Is there a cough?: Depends on how long you've had this symptom. If it's been an intermittent problem for most of your life, it might be bronchospasm or a form of asthma. I have had several patients who were not diagnosed with asthma in childhood, but are symptomatic as adults. If this is a recent development and is associated with a cough, it could be bronchitis that is irritating your bronchus under the sternum.

Infection?: The 2 main concerns are pleurisy (inflamed lung lining) and pericarditis (inflamed heart lining). Pericarditis is central or left sided, worse lying down, improved sitting up. Both are worse with deep breath or cough. Viral infection is a common cause but there are others. Ibuprofen often helps. If you have fever, it's more serious.