Well, I recently started taking Alli, and soon after I started to get these painful/ itchy bumps around my neck, hairline, and upper back. They look like serious mosquito bites, but they're not. Is this a bad reaction to Alli? Has anyone else gone through this?

Anytime you develop a rash-like symptom from something you take, you need to stop taking it immediately. That is usually not a good sign. It could be an allergic reaction, so you don't want to take any chances. Why not call your doctor and ask them. It's better to be safe then sorry. Good Luck :-)