Hello, Last week I woke up with menstrual cramps so I took a Tylenol to ease the pain a bit. About an hour later my right leg was numb. The next day the numbness moved to the whole right side of my body. Now, a week later the numbness comes and goes in my legs, feet, arms, hands and sometimes my upper spine. I seem to have an ache and tingle sensation in the middle of my upper back that sometimes seems to radiate into my shoulders. The numbness is a cold or wet feeling, and sometimes a tingle in the back of my leg. It seems to especially tingle around my right knee cap. What could this be?