Painless lump on inner thigh?
Answers: If it is cystic it could be a sebaceous cyst.
As you say it comes and go it can be a very rare femoral hernia( deeply rare and very unlikely)
If it is more on the outer lip it can be a Bartholin, cyst.
A doctor have to make the diagnosis.
i will not give a minutes worth of difficulty in saying GO TO THE DR, as my daughter have a suspicious growth in her eye and everyone told me not to worry...it be cancer. It could be a cyst.Some are harmless and will come and go.If it continues call upon your doctor or talk to your mother..
It could be a bite or a cyst. Go to the doctor babe