<unk>  is a symptom rather than a disease itself, so management should be focused on treating the underlying cause. If it is an emergency, management should always begin with securing the airway, breathing, and circulation. In patients with significant respiratory distress, supplemental oxygen (in the form of nasal canula or continuous positive airway pressure depending on severity) should be given immediately. If the methemoglobin levels are positive for methemoglobinemia, first-line treatment is to administer methylene blue.
Cyanosis
Polycythemia
Acrocyanosis
Myxedema
Retinopathy
Lipedema
Tooth discoloration
Color blindness