Wher exactly is this lump? On the pubic hair? In between the thigh and the pubis, along the pantyline? Or is it lower down, in the lower part of the labia majora?
I think the lump is quite likely to be a large boil. The pubic hair area being a soft, fatty area can allow a boil to grow to quite a big size before it bursts. If it is hard to touch, the boil is probably quite deep inside the tissues. I doubt if you could cause it to rupture by any treatment at home. Even if it does rupture spontaneously at home, you will need to consult a doctor who can help in opening out the boil for complete drainage. A boil situated deep inside the skin is very difficult to drain.
Ideally, you need to take antibiotics to cause the boil to come to a point. You will need to take antibiotics even after it has ruptured anyway, since it has increased to such a large size .
Hot compresses would have caused a point to form if the lump had been somewhat superficial.
Please take Motrin tablets 500 mg twice daily after food . This will minimize the pain.
But I really think you need to see a doctor. I do not think a lump of this size can be managed at home.
I hope this helps.
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