This is limited details and more precise information is needed about your skin condition which can help in planning a treatment. A thorough history, clinical examination and appropriate laboratory tests will be needed to solve the mystery. A photograph would have been helpful. Consider seeing a Dermatologist for proper diagnosis and treatment plan.
Next Steps
Further authentic information is in the following weblink https://www.aad.org/public/diseases/hair-and-scalp-problems/hair-loss
Health Tips
All the best. Avoid self-medications.