It will be very painful (within a week) if you don't pay attention to the basic movements just after playing. It will hurt a little in about a month. You can run at any time, but it will hurt a little if you stretch it carelessly. However, dancing and running will make you sweat. However, after playing umbilical nail, you should not get wet for more than 1 month, otherwise it will lead to umbilical nail's inflammation. Pay attention when taking a bath. When cleaning, cover the area around the umbilical cord nail with plastic film and transparent tape. But the scotch tape will fall off in the water. Be sure to do it quickly. I came up with the idea by playing umbilical nail myself. After the exercise, dry your navel with a towel. If you don't dry it, change it later. Sweating can cause inflammation of navel nails. Don't let the elastic band on your pants touch umbilical nail.