What should I do if there are red crescent-shaped areas at the tips of all ten fingernails?

Reddish semicircular marks appearing at the tips of ten fingernails can be evaluated through observing morphological changes, identifying local irritants, checking for systemic symptoms, reviewing lifestyle habits, and seeking professional medical examination. In most cases, these markings are related to local circulation or mild irritation; however, in a minority of cases, they may indicate underlying health issues. If the red arcs continue to expand, are accompanied by pain, swelling, or general discomfort, prompt medical consultation is recommended.

1. Observe Morphological Changes: Record the size, color intensity, and symmetry of the red arcs. If there are no significant changes within a short period and no associated discomfort, they are likely due to benign stimuli, requiring only continued observation.

2. Identify Local Irritants: Consider whether there has been frequent exposure to detergents, chemical agents, excessive nail trimming, or trauma. These factors may cause minor injury to the nail bed, leading to localized congestion and the formation of red arcs.

3. Check for Systemic Symptoms: If accompanied by nail thickening, brittleness, or shedding, consider possible association with fungal nail infection (onychomycosis). Symptoms such as dizziness, fatigue, and pallor may suggest anemia. In the absence of other symptoms, the cause is likely localized.

4. Review Lifestyle Habits: Chronic sleep deprivation, overwork, and high stress levels may impair peripheral circulation, resulting in nail bed congestion. Symptoms often gradually improve with better sleep hygiene and reduced stress.

5. Seek Professional Medical Evaluation: If the red arcs persist beyond 1–2 months, progressively worsen, or are associated with unusual symptoms, consult a healthcare provider for tests such as complete blood count, trace element analysis, or dermatoscopic examination to rule out organic diseases.

To prevent recurrence, avoid frequent contact with irritants, wear gloves during household chores, trim nails moderately without cutting too short or deep, and keep nails clean and dry. Maintain a balanced diet rich in vitamins and protein, follow a regular sleep schedule, and avoid staying up late to reduce the risk of peripheral circulatory disturbances.