There are many causes of white raised particles under the nose, such as cornu rashes, common warts and folliculitis. 1. Corns: Commonly known as fat grains, sebum is covered by keratin, which cannot be normally discharged to the epidermis, thus accumulating in the skin to form white particles. 2. common warts: viral infection can form warts, resulting in the phenomenon of white raised particles under the nose, warts grow faster, mainly due to human papilloma virus infection. 3. Folliculitis: white bumps under the nose may also be due to folliculitis, the hair follicle suffered a bacterial infection, resulting in the formation of white bumps, accompanied by redness, swelling, white content. There are many reasons why there are white bumps under the nose, and it is recommended that you go to the hospital in time to improve the examination and diagnosis, and take standardized treatment under the guidance of the doctor.