My 9 year olddaughter has a small dent  on the right side of her head just below her hair line. She.has had it for ages dont know if its been years or not. It doesnt hurt her she is a very heathly and active girl. Is it ok should I be worried. I am the worst worrier in the world. Lol
Don't worry about size, size of flaccid penis in childhood is not like as rectal at adults, it will grow, you can check testosterone level after 11 year and do injection 1 time in a week, but I don't think that it will be required. Hope I answered your question. Wishing you and son good health.