Your four year old may have just over exerted himself playing. Often children this age get growing pains. If this continues, you might want to see a doctor.
On his or her back with their knees flexed
On his or her back with his or her knees flexed
Under the knees if the person is on their back, between the knees if they are on their side.
Many, many things. High blood pressure, sleep problems, decreased immunity, depression, anxiety, general pain (neck, back, knees, ect.). Some people even experience hallucinations.
yes there's one that treats knees and back. yes there's one that treats knees and back.
get on your knees and ill give it back :)
If you are on your back with your hips and knees in flexion, your legs make a triangle with your knees at the peak.
The lower back, along the buttocks, back of the thighs and behind the knees. They are the ruler of joints. The back of knees usually does or kissing on the back of her thighs. Good luck!
excezma (cant spell it)
Nothing
I've only found one so far and its the hypural joint which can be found between the caudal fin of the fish and the last of its vertebrae.
They're not really called knees, but yes, they are on the front legs, they bend like our knees, and the back legs bend like our elbows. :) hope i helped