Generally, the reason why there is itching in the private parts after touching is often related to the following three reasons: 1, the private parts have been badly stimulated: such as usually do not pay attention to private hygiene, secretions and urine residues accumulated in the vulva area for a long time, or the use of private care products excessive cleaning of the private parts, etc., will cause a certain amount of stimulation to the private parts, which will lead to a significant itching feeling after touching, or even pain; 2, vulva Eczema in the vulva: often wear tight pants or poorly ventilated underwear, resulting in long-term dampness in the private parts, or eczema caused by allergies to sanitary products for the private parts, can lead to itching, especially when touched, the symptoms will become more serious; 3, the existence of vaginal inflammation: such as bacterial vaginitis, trichomonas vaginitis, mycotic vaginitis, etc., can lead to abnormal vaginal secretions, and to the private parts of the The skin mucous membrane forms a bad stimulation, thus causing itchy private parts when touched. Therefore, if you itch after touching your bottom and the symptoms are more serious, you must actively seek medical attention to clarify the diagnosis and then treat the symptoms under the guidance of a doctor.