Should I reveal a newly-diagnosed illness when renewing my insurance policy?

Hi, I have taken health insurance policy in 2016.I did not have any preexisting disease that time.In 2018,i was diagnosed with BP>. The policy is continuously renewed till 2024 without any claim. Was it necessary to declare BP in 2018 ?

What do we do the add pre existing disease in ICICI Lombard now and my policy is almost renewed thrice

At the time of renewal of policyif we declare some disease which is not there at the time of inception of policy, will the premium will increase for the disease or it will increase accordingly as per the renewal time

my policy number was taken on 19 February 2021, in the first week of March 2021 suddenly my blood pressure increased, due to which the doctor asked me to undergo angiography. After that the doctor asked to do angioplasty immediately and thus on 18 March 2021 I got angioplasty done. Now I am completely healthy, since my illness occurred within 31 days of taking the policy, company agent told me that there is no provision to cover any health related problem within 31 days. Company agent told me that there is no provision to declare any illness midway. Now I am completely healthy. Company not include my above mentioned health condition in my policy. And compny given me reply "Dear Mr. Jain, We acknowledge the receipt of your mail. With reference to our previous telcon, this is to inform that any disease or ailment/illness if found after inception of policy. It is not required to disclose under policy. But if you still wish to disclose the disease then kindly find the attached PED inclusion form, fill and submit us for further evaluation. Note : To note the disease in the policy PED form is mandatory. We request you to provide the Medical reports/ Discharge summary /any relevant /First consultation paper / medical document of the said procedure/diagnosis, which shall be kept for our reference. " What can I do.