What can cause tingling on my nose and sometimes on my forehead? No pain, it's just an annoying tingle that comes and goes.

Paresthesia. Tingling sensation can be related to hypocalcemia, multiple sclerosis, anxiety or other medical conditions! agree with dr. Melder you'll need to see your primary care doctor to start the work up.
Hard to say. With that limited information it is hard to say. If those are the only symptoms and you have had them for a while... I wouldn't be too concerned - especially if they occur independently of each other.