"A couple of weeks ago I had a shot of vodka and it almost immediately made my scalp have warm, electric crawling. I thought it was weird but didn't give it a lot of thought. A few days ago the exact same thing happened. I just stumbled upon your site (with much gratitude, it's truly awesome) and was wondering if this was a sign of parasites. I'm thinking so since I learned that anemia is linked to them."
You are correct. The most common cause of bizarre scalp sensations and itching is parasites. That is the first thing that we would try to verify or eliminate.