Male 18, white hairs starting to grow around my body

I'm a healthy 18 year old male. Recently got pfeiffers (the one where you get tired don't know any other names for it) I'm white, around 1.87m. I first discovered the white hairs around my knees. I never had them before. The hairs on my legs are dark blond. When I was showering a few days ago I discovered that around my knees and on my knees the hairs turned white. Or very very blond. It's the same for my hairs on my balls. It's really weird as they where always dark. I hoped you guys could help me. Thanks in advance. I take no medication at this time.