Hello there, I understand your concern about the swelling and pain. That gland is probably because of the tick bite. You need to be examined to make sure that there is no other reason or problem in the groin leading to the lymph node swelling. Your A1c is in good control. If I were to treat you I would give you a course of Doxycycline antibiotics to cure the infection and swelling in the gland. But you need a proper examination before the medicine can be prescribed. So please visit your physician who can do the same. Till then try to take paracetamol for the pain and do some cold compresses to the swollen area if there is no pus formation so that can relieve the pain. If there is pus then there is need for drainage of pus by the physician. Hope this helps. Take care.