Hello! Thank you for asking on HCM! First, I would like to recommend you to check your blood pressure frequently. If it keeps going on these lower values, and you experience additional complains, like excessive fatigue, dizziness, etc, it is necessary to consult your doctor for a comprehensive medical check up (careful physical exam, resting ECG, and if necessary a cardiac ultrasound). Regarding your lower back pain, easily bruising, it is important to perform a differential diagnosis. You need to consult with your doctor and possibly to perform an abdominal ultrasound; and also some blood tests, like AST, ALT, bilirubin, CPK, PCR, BUN, creatinine, electrolytes, lumbar backbone X ray study, etc. So, you don t have to worry too much, but you need to talk to your doctor immediately. Hope to have been helpful to you. Greetings! Dr. Iliri