Lesions On Buttocks, Painful To Sit, Swollen, Irritated. Cause?

omg i am so thankful there's an online help.. well my name is Lee. I'm from Trinidad, Trinidad and Tobago. So my problem... So for about 3 to 4 days now i noticed i have 2 buttons on my both butt cheeks. They're like almost symmetrical to where they are located to each other. I've had it before a good few months ago but I squeezed it and it stayed away until now. On my left cheek, that one does not hurt when I sit but its more noticeable of a button like a ready-to-burst button on the face but its covered by my skin/flesh, so it cant squeeze and pop, i believe because from that time when I squeezed it, it left a scar. On my right butt cheek its worst. I cant sit properly cause it hurts. I think from sitting, irritated it and is swollen to the circumference of maybe the average size if you meet your index finger with your thumb to make a circle. At centre you can feel the little tip. I really need to know what caused it and how to get rid of it please! I went to work today and couldn't even sit properly. Thank you very much in advance.