I Had Venous Seal Surgery The 11th, A Few Days

I had venous seal surgery the 11th, a few days ago I started feeling a pain in the front of thigh by my groin, it feels like a swollen lymph node. Today I noticed it is a little swollen and a lump in my groin area. The ultrasound after surgery showed everything sealed up nicely. I have no heat or redness in the area and feel fine otherwise.