"I have a lump that sometimes appears in the groin?"

It is possible for lymph nodes in the groin area to swell during illness, vaccination, or menstruation when the immune system is more active. Some individuals may experience menstrual cycle disturbances or delays after receiving a vaccine, but this typically resolves on its own. If the swelling persists or worsens, it is recommended to consult a doctor. Platforms like Hello Health and Maple Health could provide faster consultations, or you can visit a walk-in clinic in your area.