10 Nail Changes That May Indicate an Underlying Health Issue

10. Nail Texture Changes - Ridging and Surface Abnormalities

Nail texture abnormalities encompass a range of surface changes that can provide important clues about underlying health conditions, nutritional status, and systemic diseases. Longitudinal ridging, appearing as vertical lines running from cuticle to nail tip, becomes increasingly common with age and is often considered a normal part of aging, though pronounced ridging may indicate underlying conditions such as rheumatoid arthritis, peripheral vascular disease, or lichen planus. Transverse ridging, distinct from Beau's lines, presents as horizontal waves or corrugations across the nail surface and may result from repeated trauma, eczema, or systemic illness. Nail brittleness and splitting can indicate thyroid disorders, with both hyperthyroidism and hypothyroidism capable of causing nail fragility, though the mechanisms differ. Rough, sandpaper-like nail texture may suggest alopecia areata, psoriasis, or lichen planus, while smooth, shiny nails might indicate collagen vascular diseases or chronic malnutrition. Trachyonychia, or "twenty-nail dystrophy," presents as rough, opaque nails affecting all twenty nails and is associated with alopecia areata, psoriasis, lichen planus, and atopic dermatitis. Oil drop or salmon patch discoloration combined with texture changes strongly suggests psoriasis. Nail thickening (onychauxis) can result from trauma, fungal infections, psoriasis, or peripheral vascular disease, while nail thinning may indicate nutritional deficiencies, autoimmune conditions, or certain medications. The combination of texture changes with other nail abnormalities often provides more diagnostic information than isolated findings, emphasizing the importance of comprehensive nail examination in clinical assessment.