Since you are online, can you give me some additional information?
1) Where exactly is the lump? Is in the inguinal/groin area near the crease of the leg?
2) What is you medical history?
What you are describing is likely a lymph node from one of the several lymph node groups in the upper thigh/inguinal crease. These can occasionally increase in size... sometimes for reasons that are more or less clear.
The "red flag" warning signs that this is not just an ordinary swollen lymph node include: unexplained weight loss, night sweats, fevers, rash, fatigue, shortness of breath, chest pain, itchiness of the skin and large size (more than three quarters of an inch). It is good that you are seeing a general surgeon since only a trained medical professional has enough experience to palpate the lump and decide the course of action.
If it is not a lymphnode, it may be a lipoma or cyst, both of which are not worrisome.