What Causes Painful Burning Sensation During Ejaculation?

I don t know if this website is legit, or if you are a real doctor. But I do not have health insurance and need to know if this is important. About three days ago when I masturbated I felt a slightly painful burning sensation when I ejaculated. The next day I felt the same thing only the pain was slightly worse. I haven t masturbated since and am not sure if this is a serious issue.