I Am 76 Years Of Age For The Last 6

i am 76 years of age for the last 6 years i have sore with scabs aned a fluid under them all over arms and legs i have bee nto severaldermatologist and get no answers ,ialsohave cirrohis 4th stage since 2001 it is genetic as i have nver drank achcolor any drugs they itchand drive after all theserazy and is there away to test them by scraping or test the fluid