Most people with goiters have no signs or symptoms other than a swelling at the base of the neck. In many cases, the goiter is small enough that it's only discovered during a routine medical exam or an imaging test for another condition. Other signs or symptoms depend on whether thyroid function changes, how quickly the goiter grows and whether it obstructs breathing. Underactive thyroid (hypothyroidism) Signs and symptoms of hypothyroidism include: 
Fatigue
Increased sensitivity to cold
Increased sleepiness
Dry skin
Constipation
Muscle weakness
Problems with memory or concentration
 Overactive thyroid (hyperthyroidism) Signs and symptoms of hyperthyroidism include: 
Weight loss
Rapid heartbeat (tachycardia)
Increased sensitivity to heat
Excess sweating
Tremors
Irritability and nervousness
Muscle weakness
Frequent bowel movements
Changes in menstrual patterns
Sleep difficulty
High blood pressure
Increased appetite
 Children with hyperthyroidism might also have the following: 
Rapid growth in height
Changes in behavior
Bone growth that outpaces expected growth for the child's age
 Obstructive goiter The size or position of a goiter may obstruct the airway and voice box. Signs and symptoms may include: 
Difficulty swallowing
Difficulty breathing with exertion
Cough
Hoarseness
Snoring
