Thanks for your question on HCM. In my opinion you should get done CT THORAX first. As CT gives clear cut idea about the lesion. It is far better imaging tool than chest x ray for lung parenchyma. In CT we are able to see 1. Excact size of the lesion. 2. Margin and border of the lesion. 3. Associated with bone or not. 4. Any abnormality in other lung field. 5. Is nodule calcified or necrotic. All these points are important in deciding whether lesionis benign or malignant. So better to get done CT THORAX And diagnose yourself first and than start proper treatment. At present You can take antihistamines and cough supressant for cough.