Thanks for your question on Health Care Magic.
I can understand your concern.
Possibility of skin cancer
is less likely in your case.
Common symptoms of skin cancer are chronic skin ulcers, not improving with drugs, recurrent ulcers. These ulcers are usually painless and mostly on the sun exposed parts of the body like face, neck, hands, foot etc.
So no need to worry for your gluteal swelling, it is not cancer.
Possibility of gluteal abscess
is more in your case.
So better to consult doctor
and get done clinical examination and ultrasound
You may need surgical removal of this swelling.
Also check for diabetes
as diabetics are common to develop gluteal abscess.
Hope I have solved your query.
I will be happy to help you further. Wish you good health. Thanks.