Hmm. But is coughing a symptom of hypothyroidism? Not according to the Mayo clinic.
In fact, Hillary doesn't show ANY of the many signs of hypothyroidism.
There's something more serious than hypothyroidism that's wrong with Hillary. As usual, she is more comfortable lying about it than telling the truth.
Hypothyroidism (underactive thyroid)
Symptoms and causes
By Mayo Clinic Staff
Symptoms
Thyroid Gland
The signs and symptoms of hypothyroidism vary, depending on the severity of the hormone deficiency. But in general, any problems you have tend to develop slowly, often over a number of years.

At first, you may barely notice the symptoms of hypothyroidism, such as fatigue and weight gain, or you may simply attribute them to getting older. But as your metabolism continues to slow, you may develop more-obvious signs and symptoms. Hypothyroidism signs and symptom may include:
⦿ Fatigue
⦿ Increased sensitivity to cold
⦿ Constipation
⦿ Dry skin
⦿ Weight gain
⦿ Puffy face
⦿ Hoarseness
⦿ Muscle weakness
⦿ Elevated blood cholesterol level
⦿ Muscle aches, tenderness and stiffness
⦿ Pain, stiffness or swelling in your joints
⦿ Heavier than normal or irregular menstrual periods
⦿ Thinning hair
⦿ Slowed heart rate
⦿ Depression
⦿ Impaired memory
When hypothyroidism isn't treated, signs and symptoms can gradually become more severe. Constant stimulation of your thyroid gland to release more hormones may lead to an enlarged thyroid (goiter). In addition, you may become more forgetful, your thought processes may slow, or you may feel depressed.
Advanced hypothyroidism, known as myxedema, is rare, but when it occurs it can be life-threatening. Signs and symptoms include low blood pressure, decreased breathing, decreased body temperature, unresponsiveness and even coma. In extreme cases, myxedema can be fatal.
http://www.mayoclinic.org/diseases-conditions/hypothyroidism/symptoms-causes/dxc-20155382