Itchy scalp with heavy hair fall and thinning is often due to dandruff, scalp infection, or inflammation affecting hair roots. Keep your scalp clean with a gentle anti-dandruff routine, avoid scratching, reduce oil buildup, and use mild products to protect hair. Eat a balanced diet, stay hydrated, and manage stress to support hair growth. If itching and hair loss continue or worsen, consult a doctor to examine the scalp and guide appropriate treatment.