It sounds uncomfortable to have a recurring dry, white, boil-like lesion on your scalp for several months, especially with the habit of rubbing it. This could be a chronic skin condition such as a cyst, folliculitis, or possibly a form of dermatitis that may worsen with irritation.

• Avoid rubbing or scratching the lesion to prevent further irritation or infection.
• A topical medication like Clonate Lotion (which requires a prescription) might be helpful if prescribed by a dermatologist.
• It’s important to have a dermatologist examine the lesion to determine the exact cause and recommend appropriate treatment.

If you notice increased pain, swelling, spreading redness, or any discharge, seek medical attention promptly. Consulting a dermatologist will provide you with a tailored diagnosis and treatment plan. If you want, I can explain more about possible causes or treatment options.To narrow down potential causes, we will need some more information.I understand you have a recurring, dry, white lesion on your head. To better understand your situation, could you please share your age and gender?