Hi Voltaire,
Generally, the acupuncture points that influence circulation in the perineal region are located in the sacrum. Look for some hot spots here and put a needle in the centers of them. If you can't find any, I'd at least needle BL 27 and BL 28.
The pulses suggest there is Blood stasis causing the bleeding. A formula that helps Blood stasis in the perineum is Xue Fu Zhu Yu Tang. It is safe to use with Yunnan Bai Yao. Modified versions (NPHC, Kan Essentials) contain Turmeric, which can act as an anti-inflammatory without compromising the healing response.
Hope that helps you out!
Steve