Although it is difficult to find a doctor, you should see a physician as soon as possible.
The lump you are referring could be an abscess
or infection; so you might need oral antibiotic and local cleaning by a healthcare specialist.
Meanwhile, until you see a doctor, I'd advise to:
- apply warm and cold
compresses to the affected area
- take paracetamol
or mephenamic acid for the pain
- do massage
the sore area to make the fluid inside drain
Once again, only a doctor could assist you further!