Severe hair loss affecting around 75% of the upper scalp is abnormal and needs urgent evaluation by a dermatologist. Flaky or peeling scalp skin may indicate seborrheic dermatitis or severe dandruff, which can improve with medicated anti-dandruff shampoo, though this alone won’t stop hair loss. Poor nutrition, common with limited diets like hostel food, can weaken hair due to deficiencies in protein, iron, zinc, biotin, and vitamins, so correcting these through a balanced diet or supplements as advised by a doctor is important for regrowth. Stress, illness, or sudden lifestyle changes can cause temporary shedding (telogen effluvium), which often improves once the body adjusts. Gentle hair care, adequate hydration, sufficient sleep, and a healthy lifestyle all support hair health.