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Yes, olive oil is good for hairs. You can use it regularly with massage
from the tip of your fingers.
Possible causes of hair loss in your case:
-Vitamin and protein deficiency: Eat eggs daily, drink milk
-Fungal/Bacterial infection of head: visit dermatologist
-Androgenic baldness: Hair transplant
I hope this information has been both informative and helpful for you.
Wish you Good Health.
Dr. Ashish Mittal