Growing pains – Symptoms and causes – Mayo Clinic

Growing pains are often described as an ache or throb in the legs — often in the front of the thighs, the calves or behind the knees. Growing pains tend to affect both legs and occur at night, and may even wake a child from sleep. Although these pains are called growing pains, there’s no evidence that growth hurts.

https://www.mayoclinic.org/diseases-conditions/growing-pains/symptoms-causes/syc-20354349