Conversation: The conversation between human and AI assistant.
[|Human|] I have been having pain in middle of the chest.. since last year may.. it hurts my back.. sometimes my left arm as well.. when I go for exercise such as walk.. I feel so tired so easily.. Feel short breath as well.. Past few days the pain is increasing.. why is that happening? I am just 21 year old
[|AI|]  Thanks for your question on Chat Doctor. I can understand your concern. Get yourself evaluated with an ECG and a chest x-ray. If both are normal then it could be HERD or asthma. Also consult pulmonologist and get a clinical examination of respiratory system and PFT (Pulmonary Function Test). PFT is needed for the diagnosis of asthma. It will also tell you about severity of the disease and treatment of asthma is based on severity only. You may need inhaled bronchodilators and inhaled corticosteroids. Hope your question was answered.