What causes knee pain in a 4-year-old child?

My son has been complaining of knee pain recently. What's going on with knee pain in a 4-year-old child? He never had this before. This pain has lasted for more than half a month, sometimes in the afternoon or evening. The pain is not severe, but it will go away after a while. When it doesn't hurt, he is fine and can run and jump as usual. I can't see any pain in his knee. I was afraid that there was something wrong with my child's knee, so I consulted a doctor. Now I will tell parents with such children what the doctor told me.

Children are in a period of rapid growth, which is generally normal. It may be growing pains, but other possibilities cannot be ruled out: calcium deficiency, cold, etc. Some children may also experience leg pain when suffering from upper respiratory tract infection. This is because upper respiratory tract infection can easily cause knee periostitis. Once the upper respiratory tract infection improves, the leg pain will disappear. Children with this disease should pay attention to calcium supplementation. They can consume 250 to 350 ml of milk and 40 to 50 grams of soybeans or soy products every day. In addition, take cod liver oil and vitamin supplements every day. Children do not need to take medication to treat growing pains, but they should get more sun, exercise appropriately, get enough rest, and eat more foods rich in calcium and phosphorus, such as small fish, shrimp skin, bones, etc. Giving children some vitamin B1 and vitamin B6 can nourish the nerves and relieve nerve traction pain. In addition, the pain can be relieved through rest, massage, and hot compress. When the pain is not severe, it is recommended to take a walk or run.

During the growth and development of children, especially in the period of 3-6 years old, about 4-15% of children often experience irregular short-term pain after excessive activity, but without redness, swelling or heat. This pain will disappear quickly after rest, and the pain will gradually decrease with age and eventually disappear completely. It should be noted that although some children will experience such growing pains that do not require treatment, many diseases such as rheumatoid arthritis and allergic arthritis also have such symptoms. Therefore, once a child has lower limb pain, parents should take the child to the hospital as soon as possible in addition to carefully observing whether the child has fever, skin bleeding spots and other symptoms.

The above are what I learned from the doctor about knee pain in 4-year-old children. Many children have had such symptoms when they were young, but I don’t remember it at all. The child usually doesn’t like to eat, so I use the knee pain as an excuse to persuade the child to eat more. The child is really obedient and eats very well. With adequate nutrition, the knee pain will gradually go away.