Beauty experts and dermatologists say that your nails can help identify systemic skin problems and reveal various conditions in your body. For example, if your nails are starting to appear rippled or pitted, this may be an early sign of psoriasis, eczema, or inflammatory arthritis. If your nails are brittle and dry, you could have a deficiency of vitamins A, C, and Biotin. Dry or cracked nails can also be a symptom of anemia or thyroid-related problems. Healthy nails reflect a healthy body.