Men using finasteride have a 90% chance of halting hair loss, but treatment must be continuous to keep hair growing! Medical Conditions: Diseases such as alopecia areata (autoimmune patchy hair loss), scalp infections, and chronic illnesses can cause hair loss. Diseases such as alopecia areata (autoimmune patchy hair loss), scalp infections, and chronic illnesses can cause hair loss. Hair Transplant SurgeryFor advanced hair loss, transplanting healthy hair follicles to balding areas can restore a natural look. Knowing what's behind your hair loss helps tailor the best approach for preserving and restoring your hair.