One common change involves pale or unusually white nails. Healthy nails typically appear soft pink due to blood flow beneath the nail bed. When that color fades significantly, it may be linked to anemia, liver conditions, or nutritional deficiencies affecting red blood cell production. If pale nails are accompanied by fatigue, dizziness, or shortness of breath, consulting a healthcare professional is advisable. Similarly, yellow nails are often associated with fungal infections, particularly when thickening or brittleness occurs. However, persistent yellowing may also relate to respiratory disorders, thyroid imbalances, or diabetes. If standard treatments fail to improve discoloration, medical evaluation may be necessary.
A blue or purple tint to the nails can indicate reduced oxygen levels in the blood. This symptom is sometimes seen in individuals with heart or lung conditions. When bluish nails appear alongside chest discomfort, breathing difficulties, or unusual fatigue, prompt medical attention is important. Dark vertical lines beneath the nail may be harmless in some cases, especially depending on skin tone. However, if a streak appears suddenly, changes in size, or spreads to surrounding skin, a physician should assess it to rule out serious conditions such as melanoma.