Should I seek medical attention?

My depth perception has been “off key” this week leading to numorous cuts and slits in my right hand; left hand dominant. During this time I’ve managed to prick myself three times while working on a project etc.

Yesterday night I had accidentally pierced my skin yet again; not as a surface scratch like the two before but a gash that left me numb and bloody. It was the muscle joint between the thumb and index finger. When I had first seen it it reminded me of a valley aligned with flesh walls. I immediately pushed pressure onto the wound and wrapped it within a band-aid. Later that day I had washed off the surrounding area and applied Polysporin ointment when it was available to me.

The cut is about 1cm & 1/2 width and length.
Over night the muscle tissue inside of the opening had mended back into one piece but remains tender. Should I allow my body to recuperate on its own or ask for medical treatment—stitches?