what causes sore on scalp?
<answer> Hair shaft infections, Fungal skin infections and Bacterial infections. <context> These are the most common causes of sores on scalp: 1  Hair shaft infections – follicular infection, impetigo etc. 2  Fungal skin infections – ringworm, fungus Tinea etc. 3  Bacterial infections – Staphylococcus aureus.  Viral infections – chickenpox, Herpes Zoster 1  etc. Autoimmune disorders – Pemphigus, Psoriasis.