Tinnitus is the perception of sound in the head without an external source, occurring in various forms such as ringing or humming, and affects around 50 to 60 million people in the U.S., especially those over 55 years old. It can be caused by hearing loss, certain medications, and underlying health conditions, and while not dangerous, it can be bothersome and may impact daily life, sometimes requiring professional assistance. Various management strategies, including cognitive behavioral therapy, sound therapy, and lifestyle changes, can help alleviate the symptoms.