I have a small tender bump in the crease area between my vagina lip & inner thigh. It's both a little painful, itchy & reddish with discharge.

Possible infection. it could be an infected hair follicle or an early access (pus pocket from bacterial infection). apply moist heat for 10 minutes at a time as often as possible and take Motrin. If it worsens, gets more red or more painful, or larger you need to see a doctor quickly as you may need antibiotics, or a drainage of the access.