If you are asking if Alpha-Stim can cause this problem, we are quite confident the answer is no. It has been shown to be effective in treating tinnitus in this VA study:
Engelberg, M, et. al. Transcutaneous electrical stimulation for tinnitus. Laryngoscope, 95(10):1,167-1,173, 1985. Presented at the Meeting of the Southern Section of the American Laryngological, Rhinological and Otological Society, New Orleans, Louisiana, January, 1985. download full text article
However if you continue to use it make sure the current is very low, I suggest 100 microamperes to avoid making you temporarily more dizzy. You will need to increase the time to compensate for treating at such a low current, usually to one hour. It is most important not to stop a treatment when you feel heavy. If you feel heavy at the end of an hour, turn it back on until 2 minutes after you feel light.