A health trend known as "ferritin face" has gained attention on social media, suggesting that low iron levels in the body can be identified by visible changes in the skin, hair, and nails. While "ferritin face" is not a recognized medical condition and cannot be used to diagnose iron deficiency on its own, low ferritin levels—which indicate low iron—can lead to noticeable changes such as a pale or washed-out complexion, dark circles under the eyes, dry or dull skin, and cracked lips. However, these symptoms can also be caused by other factors like dehydration, hormonal changes, or aging. Low iron levels can also lead to fatigue, as iron is essential for producing hemoglobin, a protein in red blood cells that carries oxygen throughout the body. Persistent tiredness and difficulty performing daily tasks may be signs of iron deficiency, but similar symptoms can also result from other conditions, such as hypothyroidism, chronic kidney disease, or sleep apnea. Shortness of breath and heart palpitations are also linked to low iron levels, as the body may increase breathing and heart rates to compensate for lower oxygen levels. However, these symptoms can have other causes, and individuals experiencing them should consult a general practitioner (GP) for proper evaluation. Other symptoms associated with low iron include headaches, hair loss, mouth and tongue issues, and spoon-shaped nails. The NHS lists headaches as a common symptom of iron deficiency anemia, possibly due to iron's role in serotonin production, but headaches are not exclusive to this condition. Hair loss or thinning can occur due to reduced oxygen supply to hair roots, but it can also be caused by hormonal changes, stress, or other nutritional deficiencies. Mouth issues like angular cheilitis (ulcers at the corners of the mouth), changes in taste, difficulty swallowing, and a red, glossy tongue can also be linked to low iron, though they can have other causes. Spoon-shaped nails, known as koilonychia, can be a sign of iron deficiency anemia but often improve once the underlying issue is resolved. Some studies have also linked tinnitus, or ringing in the ears, to iron deficiency anemia, but tinnitus has many potential causes. Itchiness, or pruritus, is a less common symptom of iron deficiency, possibly due to changes in skin moisture, but it can also be caused by conditions like eczema or psoriasis. If individuals suspect they may have low iron levels, they should consult a GP for a blood test to check for anemia and ferritin levels. A full blood count and ferritin test can help diagnose the condition, and further tests may be needed to identify the cause of low iron, such as heavy menstrual bleeding, pregnancy, or blood loss from the stomach or bowel. While iron supplements may be recommended in some cases, excessive intake can lead to side effects like constipation, nausea, and stomach pain, and high doses can be dangerous. It is important to seek medical advice before starting any supplements.