Genetics may play a role as well. Some people naturally develop stronger ridges earlier than others, even when they are healthy. Mild circulation changes that occur with age can also slightly affect nail growth. Because nails grow slowly, even small changes inside the body may take months to become visible.
Most vertical ridges are not a cause for concern if the nails remain their normal color and shape. However, sudden dark streaks, pain, swelling, or major splitting should not be ignored. In those cases, speaking with a healthcare professional may help rule out underlying conditions or infections.
