Laryngitis

Laryngitis is known because of its common obvious symptom which is hoarseness or loss of voice. Laryngitis easily explained is when there is swelling of your voice box (larynx). 

Laryngitis occurs most commonly with upper respiratory infections, but can also occur with allergies, injury, overuse, and a few other conditions. If you have laryngitis, you may also have a fever and swollen lymph nodes. Using your voice too much while it's inflamed can cause permanent damage, so use it sparingly and get a white board or something!

The mayo clinic suggest to seek immediate medical attention if your child:

• Makes noisy, high-pitched breathing sounds when inhaling
• Drools more than usual
• Has trouble swallowing
• Has difficulty breathing
• Has a fever higher than 103 F (39.4 C)

Laryngitis will usually go away on its own, but you will want to notify your doctor if you hoarseness has lasted two weeks or longer.

For more info visit http://www.mayoclinic.com/health/laryngitis/DS00366