Why Nails Have Lines?

Lines or ridges in the nails are a common sign of growing age. In other cases, they may also be a warning sign of health problems such as diabetes, nail injury, trauma, and nutritional deficiency. Deep (horizontal) lines that are known as beau’s lines may indicate that you are suffering from eczema, psoriasis, or chronic paronychia. If you suspect slight or deep lines in your nails, you should talk about it with your doctor.