My husband is suffering from heat intolerance which causes dizziness, shaking, fatigue, and flushed skin. If he is exposed to even moderately elevated temperatures, especially outside while working, he is limited in his function and activities of daily living. He is 32 years old and diagnosed with Hoshimoto s disease. He has been rather therapeutic on medications for 5+ years. We have ruled out lupus and hypoglycemia. We are still seeking treatment. Most of his blood work is within normal limits. Are there any other suggestions or medical diagnoses to consider? Thanks