Hi, I Am Facing The Problem Of Nightfall From The

Hi, i am facing the problem of nightfall from the last 8 months and i had taken allopathic medicine initially and after that took ayurvedic medicine from a online site. But still there is no change. Its nearly 2 to 3 times i suffered from nightfall problem. Is there any kind of deficiency in my body due to which this is happening. Should i go for any kind of blood test? Or Which medicine i have to take to completely stop this. Please suggest.