The appearance of blood blisters bleeding frequently in testicles is mainly related to pathological factors such as tension blood blisters, skin herpes, orchitis, eczema, vascular nevus and so on. 1. Tension blood blisters: related to local blood circulation disorders, if the tension blood blisters at the scrotum testis are relatively large, the symptom of frequent bleeding can appear after rupture. 2. Cutaneous herpes: related to herpes virus infection, which can cause changes in the local skin and mucous membrane of the testicles, causing blood blisters on the skin of the testicles, which may appear frequently when ruptured, accompanied by itching, pain and other symptoms. 3. Orchitis: bacterial, viral and other infections cause testicular nodules or testicular inflammation, causing localized inflammatory reaction in the testicles, which can be manifested as blood blisters in the testicular area, which can bleed easily. 4. Eczema: It can be caused by diet, clothing friction and other stimuli, causing inflammatory skin damage to the local skin of testicles and eczema. The localization may show blood blister-like skin lesions, which often bleed. 5. Vascular nevus: belongs to skin vascular malformation, when the blood vessel ruptures, it can lead to the symptom of frequent bleeding. If the lesion appears in the scrotum, it may show symptoms of blood blisters and frequent bleeding. If blood blisters appear at the testicles, you should go to the hospital in time for causative treatment and avoid squeezing the blood blisters to avoid delaying the condition.