Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. I think you may be developed gluteal abscess, the abscess may spread to sciatic nerve or other nerve lead to tingling and numbness. You have to consult your surgeon he will check locally, use ultrasound if the local area and do ultrasound treat you accordingly. Hope I have answered your query. Let me know if I can assist you further.