I am noticing deep ridges on my fingernails. is this a symptom of something? i am a 65 year old female.

Hard : Hard to tell without a picture. Depends a bit on the orientation of the ridges (vertical vs. Horizontal). Vertical ridging running the length of the nail is common (genetically) and also typically a normal sign of aging, whereas horizontal ridging is caused by other factors. I would recommend you see a dermatologist for further evaluation. I hope that helps.

Unsure: Horizontal Nail Ridges> (Beau's line) have a variety of possible causes: 1. nail injury (biting nails, crush injury or pressure to nail in runners). 2. Chemicals (some nail polish removers. 3. ) Infections- yeast/ fungus, viral warts. 4. Skin cancer (malignant melanoma). 5. Renal, liver, thyroid diseases, Raynaud's Disease. 6. arsenic poisoning or silver overdose 7. malnutrition. 8. Zinc def