Hi, I have recently tested for thyroid and the result came as positive for hyperthyroidism. I have severe weight loss (from 62 kg to 48 kg in past 4 months) hair loss, excess sweating, tiredness, body pains. And I consulted doctor and taking medicines for thyroid past 9 days. Then i'm getting high fever, severe headache, severe cold, body pains. Please help me out whether this fever and severe headache because of this hyperthyroidism.