Hi, thank you for asking Healthcare Magic. With this presentation, I think the problem here is syncope (fainting). It could be caused by some conditions affecting the heart, neurally mediated activity (reflex) or a low blood pressure especially when standing or sitting up (orthostatic hypotension). In my opinion, i would suggest you see a cardiologist for proper assessment and management. I hope that answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. We will be delighted to answer more questions from you. I wish you good health