What Causes Bleeding From Incision Site After C-section And Tubal Ligation?

I am a 58 yo female who had 2 c-sections 28 and 30 years ago, as well as a hysterectomy and tubal ligation - all on the same site. (Bikini line) I was recently diagnosed with diabetes mellitis type 2 and have lost a little weight. A few days ago, I experienced pain in the area. It felt like the incision was new. I have bleeding from the site and am not sure what to do for it.