Hi...
Thanks for contacting healthcare magic.
After extraction still you have pain and lump like lesion present that indicate infection or presence of infectious tooth fragment in socket or other reasons.
Clinical examination of extraction site give exact idea about problems.
Consult a dentist for oral examination and treatment plan.
Irrigation of socket helpful..
X ray of affected site is helpful to rule out any fragments presence.
If tooth fragment or amalgam fragments are present than it should remove..
Start a treatment as per reason behind it..
Maintain proper hygiene of oral cavity.
Avoid trauma by using soft brush.
Proper antibiotics course helpful in infection condition.
Analgesic helpful to reduce a pain.
I hope this will help you.
Get well soon..
Thank you.