They are small to medium bumps. They resemble pimples in a way but they never come to a head. If I squeeze them, if I get anything out other than blood, it's a long white grain of infection and it's really hard. They also turn into a purplish color. What are they and why do I keep getting them. I've been with my husband for 7 years, and I have been tested for all the STD's during all three of my pregnancies and afterwards and again for my post partum checkups which was about five months ago.