<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing an irregular appearing scalp, feeling hot and cold, blindness, excessive growth and itchy scalp lately. What could be causing this?  <response>: Based on your symptoms, it is possible that you have toxoplasmosis, an infection caused by a parasite called Toxoplasma gondii. It can affect many parts of the body and cause a variety of symptoms including those you described. 