What are the signs and symptoms of hypothyroidism?

Symptoms of hypothyroidism develop slowly, often over several years. At first, you may feel tired and sluggish. Later, you may develop other signs and symptoms of a slowed-down metabolism, including:

• Feeling cold when other people do not
• Constipation
• Muscle weakness
• Weight gain, even though you are not eating more food
• Joint or muscle pain
• Feeling sad or depressed
• Feeling very tired
• Pale, dry skin
• Dry, thinning hair
• Slow heart rate
• Less sweating than usual
• A puffy face
• A hoarse voice
• More than usual menstrual bleeding

You also may have high LDL or "bad" cholesterol, which can raise your risk for heart disease.