Soreness and inflammation of the tongues
People with low iron levels in their blood can develop soreness in their mouth. Their tongues [9] may lose color, become inflamed or having an unusually smooth texture.
Low levels of iron in the body can also cause dryness in the mouth, mouth ulcers, and burning sensations in the mouth. Sometimes red cracks appear at the edges of the mouth.
Cold hands and feet
People with iron deficiency may notice that their hands and feet are unusually cold. This usually happens because the shortage of iron is preventing enough oxygen from being delivered to the hands and feet. Some people may simply become more susceptible to cold.
Depression
Adults may experience depression to varying levels when the amount of iron in their blood is low. This is more likely to happen in women during pregnancy [10].
Conclusion
Usually, your doctor is the one who can make an accurate diagnosis of iron deficiency. Most cases of iron deficiency can be helped by dietary changes and the consumption of iron supplements. Only take iron supplements recommended by your doctor. You should see your doctor if you experience more serious symptoms of iron deficiency.
References:
[1] https://pubmed.ncbi.nlm.nih.gov/26314490/
[2] https://www.webmd.com/brain/qa/how-can-blood-circulation-cause-dizziness
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6801325/
[4] healthline.com/health/spoon-nails-koilonychia
[5] https://www.ncbi.nlm.nih.gov/pubmed/26314490
[6] https://www.healthline.com/health/pica
[7] https://pubmed.ncbi.nlm.nih.gov/23494945/
[8] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3678013/
[9] https://www.ncbi.nlm.nih.gov/pubmed/24388269
[10] https://pubmed.ncbi.nlm.nih.gov/29307706/