Recurring dandruff is often caused by a scalp yeast overgrowth, which inflames hair follicles and triggers temporary hair shedding. Since your current formulation only offers temporary relief, try rotating it with shampoos containing alternative active ingredients like selenium sulfide, zinc pyrithione, ciclopirox, or coal tar. Leave the lather on your scalp for 5 minutes before rinsing. For long-term control, a dermatologist may prescribe a mild topical steroid lotion to ease stubborn inflammation. Avoid heavy hair oils, as they feed the yeast. Rest assured, this hair fall is usually reversible once the scalp inflammation is controlled.