Why do I have Loss of higher register singing voice?

Loss of higher register can result from a variety of things. The most common is an upper respiratory infection that can cause the vocal cords to swell leading to loss of higher register. This is usually transient and improves within two weeks. Vocal rest may speed up the process. Loss of higher register for a month or longer warrents evaluation by an otolaryngologist (ENT) to visualize the vocal cords and rule out nodules, cysts, tumors, and other structural or neural abnormalities.