Often picking your nostrils is easy to induce rhinitis. The skin in the nasal cavity is thin. When digging the nose by hand, hard nails will damage the mucosa in front of the nose, which is easy to cause infection and rhinitis. Others think it's okay to be careful when picking your nose. In fact, experts from Nanchong Oriental Hospital stressed that even if you don't dig, a large number of viruses carried in your nails will remain in your nasal cavity. Once the temperature, humidity and nutrition in the nasal cavity meet the requirements of virus survival, it will multiply in large numbers, leading to upper respiratory tract infection and more serious diseases.