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In some cases, nail changes may reflect underlying health conditions. Thyroid disorders, anemia, fungal infections, psoriasis, and certain autoimmune diseases can affect nail appearance. Doctors say sudden or severe nail changes should not be ignored, especially if accompanied by fatigue, hair loss, pale skin, or other unusual symptoms.
Lifestyle habits also play a major role in nail health. Frequent use of nail polish removers containing acetone, artificial nail products, or aggressive manicure techniques may weaken the nail surface. Giving nails time to recover naturally between cosmetic treatments may help reduce damage.