2. Looking pale and feeling faint are not the only signs of iron deficiency.
Symptoms of iron deficiency can be vague, says Ehman. “Women come into my office talking about feeling fatigued and not being able to exercise the way they used to.” He adds that restless leg syndrome can also be a sign. Other possible symptoms are a red, inflamed tongue; dizziness; headache; difficulty maintaining body temperature; shortness of breath; brittle nails; irritability; and rapid or irregular heartbeat. In mild cases, you might not notice any symptoms at all. Your doctor can order blood tests to check your iron levels.