Scraping can reduce abdomen. Lack of exercise in the abdomen tends to accumulate fat. You can't take a shower for three hours after shaving. Stand up straight, spread your legs apart, tighten your abdomen and find your ribs. Scrape from one side to the lower abdomen. Try scraping from side to side. In the middle of scraping, first scrape the lower abdomen from top to bottom, then from left to right, and then from right to left. The harder you work, the better you lose weight.