In my opinion you must go for sonography
scan to know the origin of the sinus
where the blood or pus is coming out. This could be a sinus or abscesses that may require drainage
by a qualified surgeon. Consult your surgeon and plan the treatment.
Meanwhile, keep the part clean and apply antiseptic lotion at the site. Do regular aseptic dressing regularly and change the dressing when it get soaked.
Hope this will help you.