You may have some sinus pressure causing the tubes in your ears to "click". Since a lot of us here have sinus problems with the CD and the drugs/disease that alters your mucous membranes you may want to consider seeing a ENT Doctor (Ears, Nose & Throat). I have occasional ringing & clicking. Usually prior to or during a sinus or ear infection or when my ears produce too much wax (yet another inherited thing). If you are having severe dizziness with nausea/vomiting or balance problems it could be a condition called vertigo which messes with the equilibrum of the inner ear.
Dx'd Jan'06, 1st Resection 7/06, Predinsone, Humira, Imuran, B12 injections, Nexium. Secondary conditions: Psorasis, Acne, Fatigue, Joint Pain, Lactose Intolerant, gallstones, fibroid cysts, peri-menopausal.