The biggest gland in the neck that releases hormones and controls metabolism is the thyroid gland.
Also, it controls breathing, heart pulse, peripheral and central nervous systems, body weight, muscle strength, temperature of the body, menstrual cycles, cholesterol levels, etc.
The iodine from the blood is used by the gland to make many hormones. The major two hormones are triiodothyronine and thyroxine.
Anxiety, nervousness, irritability, sweating, hair loss, shaking, or irregular or light menstrual periods are some of the conditions that are caused by too much production of these hormones. On the other side, too little production of these hormones cause fatigue, insomnia, low concentration, dry hair and skin, sensitivity to cold, depression, heavy menstrual cycles, and pain in the joints and muscles.
In the United States the thyroid cancer is the most developing type of cancer. Some experts claim this type of cancer increases fast because of the extra chemicals that are present in processed foods. The toxicity of the chemicals is sucked up with the iodine by the thyroid and it causes cancer.
If you have symptoms of underactive or overactive thyroid gland, or feel a lump or swelling in your thyroid, it is best to consult your doctor to examine and check your thyroid function using a blood test.
Additionally, you can perform a self-check for thyroid cancer. If in your family history you have risk factors for thyroid diseases, it is a good idea to feel your thyroid gland occasionally.
All you need to do is take a look at the video and learn how to do self-examination at home.