How do i know if i have hypothyroidism?

Symptoms/Testing: By symptoms of the under active thyroid, physical examination and blood and imaging tests symptoms of weight gain, intolerance to cold, dry skin, fatigue, puffy face, hoarseness, muscle weakness, irregular periods in women, slow heart rate, thinning hair, depression and impaired memory symptoms are variable and depend on the severity.Cinfermed by blood test for thyroid hormones and tsh, after thorough exam.