You went down on a girl and you have cold sore but it broke is not like other sores which just come up split scab then disappear this been little lump. did i give her?

It is possible that you gave her herpes simplex virus (HSV), which is the virus that causes cold sores. HSV is a common virus and can be spread through oral sex. Outbreaks of HSV typically begin with a tingling or burning sensation, followed by the appearance of small blisters or sores. The sores usually clear up within a few weeks, but the virus can remain dormant in the body and can be reactivated later in life. Your partner should see a doctor to get tested for HSV and to discuss treatment options. It may also be helpful to talk to your partner about HSV and to practice safe sex to reduce the risk of transmission.