Try taking a cleansing bath in 1 cup borax and one cup peroxide with very hot water. Soak for an hour. A lot will come out of your skin. Use a sulfer soap daily. Do this until the stuff stops coming out. Sound like debris from mites and worms. Your can use this on the dog too. You may have multiple parasites. The mites like to attack people that have worms because the worms cause candida. This is similar to what happened to me. I had some sort of mite that lived in mildew in my bathroom, treating this lead me to find out i had hookworms, Filarial worms and pin worms.