Suggest Treatment For Toe Nail Thickening After Injury

My 12 year old daughter has both great toe nails thickening over the last three years. There are no signs of onychomycosis and I think that she experienced some trauma to those toes from wearing shoes that were too tight. She also competed in gymnastics and I wonder if there is anything I can do to correct the thickening... ie debulk? She is healthy and has no medical problems.