Recurring hair loss is rarely a sign of a serious, life-threatening illness. It is most commonly linked to conditions like alopecia areata, thyroid imbalances, high stress, or nutritional deficiencies. To ease your mind, a doctor can run simple blood tests to identify any underlying causes. Regarding treatments, topical minoxidil can promote hair regrowth, and corticosteroid creams or local injections are highly effective for patchy hair loss. Please do not worry, as these conditions are very common and highly manageable. I highly recommend consulting a dermatologist for a proper evaluation and a tailored treatment plan.