Hi I Am A 30 Year Old Female With Lupus.

Hi i am a 30 year old female with lupus. My head itches excessivly and seems to get worse when i sweat and im out side alot working with horses as my everyday job so i sweat alot. I normally dont have dandruff but when im scratching all day i get dandruff and my hair falls out. it seems when i wash my head the scratching isnt as bad , but i recently noticed that i have blood spots on my pillow . ive never had bed bugs so i was wondering if those spots are from scrathcing my head then laying on my pillow. or should i look futher into bugs