4-year-old baby knee after crawling on the floor sleep pain tossing and turning may be a knee knock or cold caused by, you can take general treatment, medication and other methods of treatment. 1. Knocked knee: If the knee is swollen and painful, you can use ice packs on the knee within 72 hours, which can effectively reduce the soft tissue rupture due to increased swelling; after 72 hours, you can use a hot towel to apply a hot compress to accelerate the subsidence of edema, and use soft clothes to avoid irritation of the affected area. Eat a light diet, and eat calcium-rich foods such as milk, beans and shrimp. 2. Cold: 4-year-old baby knee pain after cold can be appropriate hot compresses, promote blood circulation; can also be localized massage, relieve pain. In addition, you can drink more warm water to promote metabolism. 4-year-old baby knee pain if the symptoms continue to be unable to relieve, it is recommended to go to the hospital in time.