Hello, Thanks for posting in HCM. There are multiple causes for low BP. But the reason you are suspecting 1 month back is not possible. Most common cause is hypovolemia due to dehydration, vomiting, diarrhea or some electrolyte imbalance. There are other causes like anemia, any heart condition or even hormonal causes like hypothyroidism. It will be better if you get your BP checked regularly with doctor to see whether low BP is consistent or it was just incidental. Also no such restrictions on diet. You can eat and drink what you normally take ans keep yourself well hydrated. Consult your doctor for reasons mentioned above. Thank you