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Otolaryngology, also called ENT, is the branch of medicine that deals with problems of the ear, nose, and throat. ENT doctors also treat problems affecting nearby areas of the head and neck, including the thyroid, salivary glands, and other related structures. They treat common problems such as hearing loss, sinus problems, allergies, dizziness and throat infections, as well as more serious conditions such as cancers of the head and neck. Since the ears, nose, and throat are connected, a problem in one area can sometimes affect another. 

An ENT specialist is a doctor who is trained to diagnose and treat problems of the ear, nose, throat, and related areas of the head and neck.

An ENT specialist diagnoses and manages conditions affecting the ear, nose, throat, and related head and neck structures. Their scope includes: 

• Otology/Neurotology: Treating hearing loss, tinnitus, and balance disorders (vertigo) using medical, surgical, rehabilitative, or hearing-device-based approaches when appropriate.
• Rhinology: Managing chronic sinusitis, deviated septums (DNS), and nasal polyps through medical treatment and, when indicated, endoscopic "keyhole" surgery.
• Laryngology: Treating voice disorders, swallowing difficulties, and chronic hoarseness in singers or professional speakers.
• Head and Neck Surgery: Diagnosing and surgically managing selected conditions and tumours involving the thyroid, salivary glands, and other head and neck structures. 
• Sleep Medicine: Evaluating and treating structural and other factors contributing to snoring and obstructive sleep apnea, including surgery in selected patients.
• Pediatric ENT: Managing "glue ear," enlarged tonsils, and adenoids in children, which may affect hearing, sleep, speech, or development. 

You should seek a consult if you encounter these specific sensory or structural issues:

• Persistent Hoarseness: Any change in voice that lasts more than a few weeks or is persistent should be evaluated, particularly when accompanied by other concerning symptoms. 
• Sudden Hearing Loss: Sudden unexplained hearing loss, particularly in one ear, requires urgent medical assessment. Prompt diagnosis and treatment, when appropriate, may improve the chance of hearing recovery. 
• Chronic Sinus Pressure: Facial pain, thick nasal discharge, and a loss of smell that persist or recur despite appropriate treatment. 
• Lump in the Neck: Any new swelling in the neck, whether painful or not, should be medically evaluated because it can have several causes, including thyroid, lymph-node, or salivary-gland conditions. 
• Dizziness or Spinning: Feeling like the room is moving (vertigo), which can have inner-ear, neurological, or other causes. 
• Difficulty Swallowing: A sensation of food getting stuck in the throat (dysphagia).

• Ear Infection (Otitis Media/Externa): Inflammation or infection in the middle or outer ear, often causing intense pain and temporary hearing loss.
• Sinusitis: Inflammation of the sinuses that may cause nasal congestion, mucus discharge, facial pressure, or reduced sense of smell. 
• Tonsillitis: Infection of the tonsils, the two lymph nodes located at the back of the throat, causing severe pain and difficulty swallowing.
• Hearing Loss: A reduced ability to hear sounds. It can be conductive, caused by problems or blockage in the outer or middle ear, or sensorineural, caused by problems in the inner ear or the nerve pathways that carry sound to the brain. 
• Vertigo: A sensation of whirling or movement, which can occur due to conditions such as BPPV, Ménière's disease, vestibular migraine, or other causes. 
• Blocked Nose (Nasal Obstruction): Often caused by a deviated septum, nasal polyps, or chronic allergies.
• Sleep Apnea: A condition in which breathing repeatedly stops or becomes reduced during sleep, often due to airway narrowing or obstruction.
• Neck Swelling: Enlargement of the lymph nodes, salivary glands, or thyroid gland.
• Thyroid Nodules: Abnormal growths on the thyroid gland may require clinical assessment, thyroid-function testing, ultrasound, and sometimes biopsy depending on their features. 
• Sore Throat (Pharyngitis): Persistent pain or irritation in the throat, often worsened by swallowing.