Thanks for your question on Healthcare Magic. I can understand your concern. By your history and description, possibility of vaso vagal attack is more likely. You are mostly having viral upper respiratory tract infection (URTI) which is causing blocked nose and cough. This viral infection can also provoke vaso vagal reaction upon prolonged standing in sun bed. So better not to do such activity when you are having any symptoms like cough, cold. Drink plenty of fluids orally is the only treatment of vaso vagal reaction. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.