I am a bald NW6 male 55yrs. When I raise my eyebrows, my bald scalp moves forward and I have wrinkles along the top of my head.

My bald scalp, seems to wrinkle when my frontalis muscles contract (raising my eyebrows). When my forehead is relaxed, my scalp skin and head is smooth with no significant wrinkling. When I raise my eyebrows, my whole scalp moves forward, and causes linear wrinkles along the top of my head. When I lower my eyebrows, my scalp retracts and the wrinkles are no longer present. Is this unusual? Would reducing the range of movement of my forehead / frontalis with Botox help with this?