<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have some skin irritation on my scalp, and the skin is looking abnormal with some irregularities. Theres also some skin rash and a new skin lesion thats worrying me.  <response>: Based on your symptoms, it seems like you might have actinic keratosis, a skin condition caused by prolonged exposure to the sun. I suggest getting a skin biopsy done to confirm the diagnosis and to discuss treatment options with a dermatologist. 