It sounds more like an abcess than a fissure. And now
the abcess has fistulized or tunneled to the inside.
You need it to drain, the heating pad probably drew
the pus to the surface. If kept inside it tunnels to
somewhere else to get out - like the colon, bladder,
vagina. Colonoscopy shouldn't make it worse and the
best way for them to see what is going on inside. The
clean out before the test is unpleasant and many
suggest eating less a few days before so there is less
to clean out. Make sure when you are on liquids and
jello, none of them are red. Be prepared to spend much
time in bathroom(reading material, word puzzles etc).
Have water to wet the TP or buy flushable wipes. Have
vaseline or lanolin or zinc oxide product to help
things not get too sore. Hope this helps! Janet
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