Signs and symptoms of damage to the bones in the head and neck are as follows:

• Bone underdevelopment

• Altered or asymmetric appearance

Signs and symptoms of damage to the mouth or throat are as follows:

• Missing teeth

• Crooked teeth

• Cavities

• Small teeth

• Short teeth roots

• Enamel problems

• Dry mouth caused by decreased salivary flow

• Altered taste

• Bad breath

Signs and symptoms of sinus problems are as follows:

• Chronic post-nasal drip

• Chronic discharge from nostrils, especially on the irradiated side

• Pain in cheekbones or above eyebrows

• Headaches

• Bad breath

Symptoms of esophageal reflux are as follows:

• Difficulty and/or painful swallowing (especially dry foods)

• Burning discomfort beneath breastbone (called acid indigestion or heartburn)

• Burning feeling in the throat

• Feeling of food coming back up in the throat

• Bitter or sour taste in the mouth

• Weight loss

• Belching

• Hoarseness

• Breathing problems, such as asthma, coughing, wheezing, or vocal cord inflammation