Is my hair addicted to dandruff shampoos?

I have dandruff that responds well to over-the-counter shampoo. Ergo, I have been using the stuff almost exclusively for ten years. No brand in particular, sometimes zinc pyrithione (the blue stuff!), sometimes coal tar (the smelly brown stuff!). Anytime I switch to non-dandruff shampoo for like three to four days straight, I get my dandruff back. I worry that I might be addicted to dandruff shampoo. Should I worry?


Is what I'm experiencing a urinary tract infection?

I think I may have some kind of urinary tract infection. It came on very suddenly, about three nights ago. And when I pee, there is a burning sensation when my bladder has almost emptied. It's not an STD because I'm in a monogamous relationship, and yes, I'm sure! Please help. Thank you.