The common reasons for itchy balls after lovemaking may be due to allergic reactions, fungal infections, pubic lice or scabies infections. First of all, consider whether it is allergic to condoms, causing itching around the external genitalia; secondly, it is likely to be the woman who have sex with vaginitis and other gynecological diseases caused by fungal infection; pubic lice or scabies infection is also a common cause of testicular scrotum itching. Therefore, itching is recommended that patients go to the urology department to receive examination and treatment to identify the cause, do not take medication without authorization. Usually pay attention to hygiene during intercourse to avoid the spread of disease.