Brittle, cracked nails, spoon-shaped nails, hairfall Cracks near the side of your mouth Sore and swollen tongue What happens if iron deficiency anaemia is untreated: Various illnesses can strike as your immunity dips. One can suffer from depression. The immune system gets weakened. The risk of infection is elevated. Pregnant women can suffer preterm delivery. Babies can be born with low-birth-weight. A low count of red blood cells puts more pumping strain on the heart and a person can suffer heart problems. The low iron count can cause delay developmental milestones in children. Your doctor might run a few blood tests to find out why your iron is low. Your doctor will recommend a dose based on your iron levels. Taking vitamin C helps your body absorb iron.