Although there are many causes of headaches, frequent, recurrent headaches and dizziness could be a sign of iron deficiency. Headaches and dizziness could be a sign of iron deficiency.

You also may feel grumpy, have headaches, and have trouble concentrating. Most people begin to feel normal after a few weeks of taking iron pills. But you need to take the pills for several months to build up the iron supply in your body. This can take up to 6 months.

When taken by mouth: Iron is LIKELY SAFE for most people when it is taken by mouth in appropriate amounts. It can cause side effects such as stomach upset and pain, constipation or diarrhea, nausea, and vomiting. Taking iron supplements with food seems to reduce some of these side effects.

Iron supplements can cause side effects like dizziness, fainting, and hives. Too many iron supplements can cause long-term side effects like liver damage and heart disease.

Anemia. Anemia (low red blood cell count), whether it occurs acutely from bleeding or gradually for a variety of reasons, can cause fainting because there aren’t enough red blood cells to deliver oxygen to the brain.

An iron deficiency can cause many symptoms, including dizziness, fatigue, and cold hands and feet. A doctor can usually diagnose an iron deficiency using a simple blood test. Treatment may involve taking prescription iron supplements for several months.

Headaches caused by IDA are treated by increasing your iron level with iron pills. Once your iron level is back to normal, your red blood cells will be able to carry the proper amount of oxygen to your brain.

Pale skin may be a sign of anemia or dehydration. Anemia can occur due to blood loss or to certain chronic medical conditions or nutritional deficiencies. Shaking can occur with neurological conditions as well as stress reactions or temporary conditions.

Iron-deficiency anemia develops slowly — your symptoms could be mild, or you may not even have any. But when the anemia gets worse, fatigue and weakness may appear.