 [ Symptoms ] my husband has a discolored hard spot on his lower right back it has increased in size and painless what could it be  it started as about the size of a quarter and now about 6 8inches long and the skin is reddish purple it started about 3 months ago [ Disease ] your vague description is really not sufficient to make this important diagnostic call the only way that your husband can be properly diagnosed is to see a medical professionaldermatologist for a hands on examination