1 to 10 times.  In a time Start gradually

It is a good exercise if performed well with technique bt done be too aggressive on you, dose will b decided only after your physical evaluation

Hello Depends on ur medical condition . If u have blood pressure issues or cervical or back issue then it's not allowed

If you have any issues with with your back and neck. Or you have low or high BP it is not advisable. During head stand blood flow increase and reaches to brain.so without advice and properly adviced by your physician do not attempt it.to avoid further complcations.

Once per day is enough. Dont do it in repited sets. As it increases vertebral pressure and can cause further problems for u.

Doing headstand is good for enhancing the blood flow to your brain and enhancing the strength of the neck musculature. Can be repeated two to three times with a rest interval of five minutes between repetitions. One thing that needs to be kept in mind is that you should not abruptly stand up straight after finishing the headstand but rather allow some time for the blood to flow back to all your body parts. Furthermore, it can be supplemented with breathing control to fetch the maximum benefits.

May I know for what purpose u do this and do you the know effect of head stand definitely without knowing then why do u ask for repetition suddenly if u don’t do it n perfect position do u know what happen the result is sudden death only some does yoga without any knowledge I have seen a young lady doing this and the result was a slip happened while performing and she died on the spot Becoz of the consequence. So kindly avoid doing it and don’t ever ask for repetition too stay safe save ur life in this just 21 years old Becoz ur family members are there for you .