What symptoms can hyperthyroidism or low thyroid cause?

[Zmoney21]

Hi, on the 25 of this month I will be going to the doctor to get my blood checked for my thyroid. This was a referral from the eye doctor because Of my vision which is fine now. But here's my question... How do I know if I have low thyroid or hyperthyroidism? What do the symptoms cause? I wanna know what it can make you feel in every way. What can doctors do if you do have low thyroid? Thank you. Please answer speedily.

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Symptoms will include - menstrual cycle changes, slow heart rate, gaining weight, fatigue, depression, constipation,hair loss, dry skin. The main treatment is -thyroid hormones.