Hi and welcome to Healthcaremagic. Thank you for your query. Considering your description it seems like there is an abscess or so called Schlofer tumor and I am afraid that there is no home remedy for something like this. This usually happens due to infllamation around subcutaneous stitch which is placed during c section. If there are no skin changes such as redness, pus discharge or pain and fever then you should definitely see doctor since incision and surgical drainage may be required. ALso, dont try to scratch this or drain it alone since you may just worsen the infection. I hope I have answered you query. If you have any further questions you can contact us in every time. Kindly regards. Wish you a good health.