Seek medical attention if you or a person you know has hypothyroidism and develops signs of myxedema coma, such as:

• Mental deterioration, such as apathy, confusion, and psychosis.
• Extreme weakness and fatigue that progress to loss of consciousness (coma).
• Severe breathing difficulties, slow heart rate (less than 60 beats per minute), or low body temperature [95 °F(35 °C) or below].

See your health professional if you have any symptoms that don't go away, including:

• Constipation.
• An inability to tolerate cold.
• Feeling tired, sluggish, or weak.
• Dry skin, brittle nails, or a yellowish tint to the skin.
• Memory problems, depression, or difficulty concentrating.
• Heavy or irregular menstrual periods that may last longer than 5 to 7 days.