<s>[INST] I have 9 years old son. He has one ailment since three years back. He use to have pains on his leg, knee, foot and sometimes on his arms. Sometime on the right side and sometime on the left side. This pain happen from time to time and especially in the evening when he plays more. We use to massage his leg or foot till he sleeps but sometime he use to wake up at night complaining severe pain. My other kids do not have this kind of illness. So kindly help us in getting treatment for him please. [/INST] Hello,I read carefully your query and understand your concern. Growing pains are a common cause of leg pain in children. These pains are muscle aches that can occur in the thighs, behind the knees, or the calves. Other possible causes of leg pain that may be more serious can include juvenile idiopathic arthritis.So,I suggest to exclude this diagnosis through examination such as Rheumatoid factor level. Meanwhile,I suggest to use Tylenol for the pain. Hope my answer was helpful.If you have further queries feel free to contact me again.Kind regards! Dr.Dorina Gurabardhi General &Family Physician </s>