Thanks for writing your query.
After reading your post it seems that your husband is not on any medicines. Please get his vitals checked especially blood pressure.
Symptoms of your husband can be seen in Vaso-Vagal attack. In this due to decrease in heart rate
, there occurs fall in blood pressure, resulting in decreased blood flow to the brain. As a result oxygen
supply to the brain decreases resulting in symptoms of light headedness, sweating and unconscioussness.
Lying down with head end at lower level as compared to foot level will increase blood flow towards brain and will help in relief of symptoms.
It will be advisable that you should get your husband examined by a Neurophysician to rule out other causes and get a scan of his head done.
Orthostatic training exercises are also seen to decrease the recurrance of the attacks.
I hope this is helpful to you.