1. from the history it seems to be a groin Lump and should be assessed by a doctor as soon as possible.
2. if you have any infection or illness, your groin lump could be a swollen lymph gland
which will flare and swell to remove bacteria and foreign particles, and will return to normal once the illness has passed.
3. as there are so many possible causes of a groin lump [pemphigoid
bullous, STD's,] your doctor will need to ask you a series of questions, which will include questions about your current health and if you have been suffering from any other symptoms. You may have a blood test
to check for signs of infection, and the doctor will feel your lymph nodes for inflammation.