Brief Answer:
several possibilities can be there..

Detailed Answer:
Hello XXXXXXX Welcome to HCM..

I've gone through your query and understand your concern..

Now at your age , without any significant ailments, sudden onset giddiness can be due to several reasons, so to narrow it down, please try to go through the following questionnaire and let me know the answers so that I can guide you in a more specific way..

Since when this has started ? Also did it start all of a sudden or after any specific activity?

Are you feeling nauseated also ? was there any vomiting, if yes then how many times ?

Is this the first time it has happened to you ?

What relieves/worsens it ?

Any black-outs/visual disturbances ? any headache ?

Any other problems ? Any recent history of binge drinking ?

Are you under any kind of stress lately ? Can you please share your occupation history and does it involves a lot of stress ?

Are you getting adequate sleep lately ?

Please go through them and try to answer them by taking your time as they'll throw some light in this regard..

In the meanwhile stay rested, don't indulge in to any kind of strenuous activities/don't try driving either..drink a lot a water and stay well hydrated..

Get back to me with the details, awaiting for your response..based on your response, further course of action/precaution/investigations/check-ups will be determined..

Take Care
Kind Regards

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