Thanks for your question on HCM. I want to ask few questions. Is the overlying skin reddened or any blister on skin of involved region? If so than it is due to herpes zoster
infection. It is viral infection of skin with dermatomal involvement. And it is commonly seen in diabetics. Other possibility is muscular pain
). In this due to muscle damage CPK tend to be higher side. So this is also a possibility. As a rule left sided chest pain
should always be evaluated for cardiac cause. So atleast get done ECG and 2D Echo.