I welcome you to healthcare magic for your health concerns I am Dr Fahim and I will looking into your problem I have gone through your question and understood your concerns. There is lump near your tail bone and its asymptomatic. It appears to be pilonidal cyst, at present nothing is required except observation. There is chances of it to get infected, them it will results in pilonidal abscess. Timely drainage of this abscess in important, otherwise it will result in pilonidal sinus which will require a surgical excision of the sinus tract under spinal anesthesia. At the moment observe this lump and keep the area dry and clean, if it get painful consult general surgeon for incision and drainage. I hope my answer will help. Do rate if you like it. Regards