The symptoms of thyroid disease are very broad and vary with hypothyroid and hyperthyroid. 

The following are symptoms of Hypothyroid (slow, underactive)  - Hypothyroidism is a condition in which the body lacks sufficient thyroid hormones. Since the main purpose of thyroid hormones is to "run the body's metabolism," it is logical that people with this condition will have symptoms associated with a slow metabolism.

• Constant fatigue, tireness or sluggishness

• Cold feet and/or hands

• Requiring excessive amounts of sleep to function

• Weight gain or difficulty losing weight

• Difficult or infrequent bowel movements (constipation)

• Depression or lack of motivation

• Morning headaches (sometimes migraines) that wear off as the day progresses

• Hair that is excessively thinning or falling out

• Dry skin and/or scalp

• Mental sluggishness or Brain Fog

• Goiter or enlarging of the thyroid or nodules on the thyroid

• Swelling of the face and extremities

• Hoarseness of the voice

The following are symptoms of Hyperthyroidism, Grave's Disease or Thyrotoxicosis (Overactive Thyroid). Hyperthyroidism refers to the over activity of the thyroid and the over production of thyroid hormones.  Although this condition is less common, it can precede or follow a slowing down of the thyroid.

• Heart palpitations

• Inward trembling

• Rapid or increased pulse even at rest

• Nervous and/or emotional without reason

• Insomnia or difficulty sleeping

• Night sweats

• Unexplained weight loss or difficulty gaining weight

Hashimoto's Thyroiditis

There is also a condition called Hashimoto's Thyroiditis or Hashimoto's Disease which can have symptoms of BOTH Hypo and Hyperthyroid.  This is what I have discovered about myself.  I don't have Grave's Disease but rather Hashimoto's Disease.  My symptoms crossed both conditions.  Again I encourage you to seek the help of a knowledgable Naturopathic or Chiropractic doctor.