Hyperfocus makes me exhausted

Most of the time hyperfocus involves something banal that I can't stop paying attention to or take pleasure in absorbing. My most recent hyperfocus is on the gray hair that has been emerging. I have very dark hair and it is inconsistent, in addition to the thickness of the hair being different. I waste hours in front of the mirror - especially when my hair is dirty - trying to unite all the black hair and separate or straighten the white hair. My arms hurt, but when this activity is done, it brings me a lot of satisfaction. Have you ever felt this way? What hyperfocus did this to you?