Hello and hope you are doing well.
The lumps are unlikely to be related to urinary tract infections. The 'lumps' could be sebaceous cysts, acne, lipoma or lymph nodes. They could also be herpes infections, yeast infections and infected hair follicles. If there is accompanying swelling, redness, discharge and fever it is most probably an infection. You may need to consult your primary care physician who will examine you and initiate appropriate therapy.
Hope this helped and do keep us posted.