Welcome to HCM,
is curable but proper diagnosis is required. Be optimistic.
When we breath in or out, our pleura
moves against each other and our diaphragm also move.
Thus if chest pain is increasing on inspiration/expiration, in can be due to pleurisy
or inflammation just below diaphragm.
As it requires examination and some investigations like x-ray chest, ECG etc, you should consult a Physician.
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With good wishes,