4 Signs Your Thyroid Is to Blame for Your Winter Blues

Many seasonal affective disorder (SAD) symptoms, both physical and emotional, can overlap with hypothyroidism symptoms, but it would be extremely rare for someone with a thyroid problem to only have emotional ones, says Brogan. That means thinking 'I've been feeling sad lately' would be just one among a list of issues. "Hypothyroidism isn't just depression, you may also experience other symptoms like constipation, cold hands and feet, hair loss and lackluster skin," Romm says.