Okay, are you low iodine? Many of us have to go low iodine for a while to get the rash to calm down. Iodine really fires the rash --- it's documented in medical texts. For low iodine guidelines see:
As to the possible cross contamination issue. Read or re-read the newbie 101 as a refresher course. There is a link in there about how to make sure your dishes, pots & pans, utensils, toasters etc.... are not cc'ing you. Also other great info. in that.
I strongly recommend you also eat only whole foods - strictly. Forget the processed foods. This is how you can insure you are not getting cross contamination until you get this stuff under some kind of control.
Are all your shampoos, conditioners etc.... gluten-free?
You have not been on Dapsone all that long yet & as we are all individuals then sometimes it can take a while for the Dapsone to kick in good. Also worth mentioning is the Dapsone is only going to help the itch at this point --- it is not going to heal the sores & lesions you already have going. They are going to play out their process regardless. AND Dapsone will not necessarily stop ALL the itch & mask ALL the dh from what I have read but it should make things far more bearable.
I remember reading on one of your posts that you have been gluten-free for 9 months now. You do realize a dh biopsy will be a false neg. since you have been gluten-free unless you ARE getting glutened. Also, topical or oral steroids used within 2 months prior will make a dh biopsy a wash.
AND dh can continue to react or present for up to & even longer than 2 years (maybe 10 years ) after going gluten-free. ALL the antibodies have to get out of the skin. Dh can flare & then go away & flare again & so forth anytime until all the antibodies get out of the skin. I have been squeaky clean gluten-free since Dec. 2011 & in Sept. I began a dh flare that is continuing as I type & it's as bad or very close to as bad as yours is. My entire body has been affected --- many portions multiple times. I do not have the option of taking Dapsone as I am allergic to sulfa drugs. And yes, my hubs & my sheets look like yours each morning with the skin shedding on them & naps too.
I know you are hurting & suffering & very, very scared. Dh is scary stuff & it loves to terrorize us! It isn't called the suicidal itch for nothing. And it will make you question everything you eat. It will make you crazy like a loon. I am so sorry that you are going through this. I wish not one single person more in this world had to go through dh. It's pure hell. Been there, done that, still doing it.
Dh also flares with stress. Yeah, I know --- dh stresses us out so how do we de-stress? I wish I had the answer.
I can't tell you much on the infected spots. It is what it is. I use a lot of witch hazel --- drying yes, but then you moisturize but witch hazel keeps infection down. Have you tried peroxide on the infected spots? Then you can coat with honey & go back & forth several times a day.
For what it's worth you are not alone in this. It doesn't help much but during the worst times it can help a bit to think about there being others of us out there who know what you're going through. There are those who have posted here who have made it to the other side of this viscous beast. That knowledge is what helps me most when things are the worst. When I first came here these people were actively posting on here & they helped me to learn all the ropes. Some don't post at all now & some are infrequent but I want you to know that there are people who have made it to the other side.
And tell us how your derm appt. went today.
Rant, rave, scream & cry --- it's allowed here.
Again, I send you huge & very tender hugs. ((((((((ANN)))))))))