DEAR USER symptoms of that torn skin with itching between buttocks refer to have skin infection bacterial or fungal infection that could cause that you should see your doctor for clinicla examination and to see these lesions and detect the cause you can do investigative test to confirm diagnosis by wound culture to detect micro organism causing that you should not get damp of the leision and try to keep your skin dry avoising excessive sweating as sweating will cause severe irritation and more pain with itching you can use local antibiotic cream such as erythromycin cream if bacterial infection suspectedand you can use fluconazole cream if fungal infection suspected.....if you have some difficulties to see the doctor you can try each of them avoid tight narrow clothes and wear cotton clothes and wide clothes wish you healthy life