The first thing you need to do is to pay attention to local hygiene, rinse with warm water after each bowel movement, and wear breathable cotton underwear, because this part is special, ventilation and breathability is very poor, usually sweat secretion is more, there is a residue of stool will easily lead to bad smell. If the situation does not improve by paying attention to hygiene, you need to pay attention to find the cause, such as whether suffering from anal fistula or internal hemorrhoids, external hemorrhoids, these diseases due to more secretions, it is easy to appear odor, you can see the anorectal department by the doctor to do rectal diagnosis or anoscopy to find the exact cause, and give the corresponding treatment measures. You can find the exact cause and give the appropriate treatment measures. Pay attention to a light diet and avoid spicy and irritating foods.