Physical examination is usually all that is needed to find out if hoarseness is caused by a respiratory tract infection.
Patients, especially smokers, with lasting hoarseness will need to see an otolaryngologist (ear, nose, and throat doctor) for tests of the throat and upper airway.
Cummings CW, Flint PW, Haughey BH, et al. Otolaryngology: Head & Neck Surgery. 4th ed. St Louis, Mo; Mosby; 2005.
Rakel P, ed. Conn’s Current Therapy 2007. 59th ed. Philadelphia, Pa: WB Saunders; 2007.