Hi, You mention that you have clogged ears and tinnitus. Potential causes of clogged ears are a Eustachian tube blockage, the common cold, influenza, or sinusitis. Allergic rhinitis can also cause a blockage in the Eustachian tube but in my opinion, allergies are not the root cause and cannot explain all your symptoms. About ringing on one ear or tinnitus, I can say that tinnitus isn t a condition itself — it s a symptom of an underlying condition, such as age-related hearing loss, ear injury or a circulatory system disorder. It is impossible to identify the cause of your ear symptoms without an ear examination or otoscopy. Any disturbance or blockage of the ear canal (such as excessive ear wax, foreign body, etc.) may cause the fullness and ringing in the affected ear. There are also other transient possibilities such as the Eustachian dysfunction or nasal congestion on one side. However, unilateral or one-sided tinnitus and fullness or hearing loss require urgent medical attention. For this reason, I strongly suggest that you visit an ENT specialist or and an Audiologist without delay. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Elona Xhardo, Endocrinologist