What Causes Trouble After Pressing Neck?

HI. AM HAVING AN UNUSUAL PROBLEM FROM MY CHILDHOOD. I PRESS MY NECK WITH MY LEFT HAND WHICH MAKES AN OBSTACLE TO THE BLOOD FLOW TO BRAIN........AFTER A MINUTE I FIND MY SELF ON GROUND OR IN A STATE OF ABSENTISM. MY MEMORY WILL BE REGAINED AFTER A MINUTE....>NOW MY AGE IS 28 YRS/MALE. IS THIS A PSYCHO PROBLEM? PLEASE SUGGEST.YOUR KIND SUPPORTS IN THIS REGARD IS SOLICIT