Acute Pharyngitis: This is the most common cause of sore throat and can be accompanied by hoarseness if the inflammation extends to the larynx. Ear pain can also be referred from the throat due to shared nerve pathways.

Laryngitis: Inflammation of the larynx can cause hoarseness and, if severe, can refer pain to the ear. It often results from overuse of the voice, viral infections, or irritants.
Tonsillitis: Infection of the tonsils can cause severe sore throat, fever, and can refer pain to the ears. Hoarseness might not be a primary symptom but can occur if the inflammation affects the surrounding areas.
Sinusitis: Although primarily causing facial pain and nasal congestion, sinusitis can lead to referred pain in the ears and throat, potentially causing hoarseness if postnasal drip irritates the vocal cords.

Epiglottitis: A medical emergency that can cause severe sore throat, difficulty swallowing, hoarseness, and ear pain. It requires prompt recognition and treatment to prevent airway obstruction.
Peritonsillar Abscess: A complication of tonsillitis that can cause severe throat pain, fever, and can refer pain to the ear. It's a medical emergency if it compromises the airway.
Lemierre's Syndrome: A rare but serious condition following a throat infection, characterized by jugular vein thrombosis and can lead to sepsis. Early recognition is crucial.

Strep Throat with Poststreptococcal Glomerulonephritis: While strep throat is common, the development of poststreptococcal glomerulonephritis (a kidney disease) is rare but can have serious consequences if not treated.
Tuberculosis (TB) of the Larynx: A rare form of TB that can cause hoarseness, sore throat, and ear pain, especially in immunocompromised individuals or those from endemic areas.
Laryngeal Cancer: Although rare, it can present with hoarseness, sore throat, and ear pain, especially in smokers or those with a history of significant voice abuse.