Please recommend some treatment for the prickly and itchy rashes on my abdomen.

Hello doctor,

I have a rash on my abdomen or the lower chest area and also in the mid back. It is being there from the past three weeks. This is the second time that I am getting the rash within these six months. About four to six months back, I first got this type of rash. The rash appears flat with no bumps and it is pink in color. The rash is prickly and itchy at times, mostly the ones present on my back. Sometimes, the rash becomes red, especially if I start itching. Sometimes the rash appears blotchy. The rash looks like a versicolor rash. I am fair skinned. I have tried antifungal creams, shampoo and pills, but it has not disappeared. It seems to flare up when it is hot, sweaty and also after a hot shower. I recently tried applying a mixture of coconut oil and apple cider vinegar and the rash intensely flared up and appeared very red in the affected area. Please recommend some treatment for this.

Thank you doctor,

I did the diascopy test. The red rash disappeared and turned completely white as soon as I put my finger pressure on it. After a second, it became red again. I have tried taking the antihistamine as well and is not of much help. I have been taking it for the past four to five days. I live in a very tropical hot climate area. I sweat a lot during exercise and work, more than the average person. I work as a wedding photographer. I work outside weddings three to four times a month. I am not ruling out allergic contact dermatitis or sweat dermatitis. Since I thought it as Tinea versicolor based on its appearance and action, I would like to know what made you think it is allergic contact dermatitis or sweat dermatitis and not Tinea versicolor.

Thank you doctor,

The rash does slightly scale and it looks slightly dry in some places. It feels dry and sometimes leathery. Would allergic contact dermatitis or sweat dermatitis do this?

Thank you doctor,

The fact is that the rash is blanchable and P. versicolor is non-blanchable. Blanchable means it turns white when I apply pressure, correct? Non-blanchable means, it would remain red? Will this definitely rule out P. versicolor? Please note the photo that I sent you were taken right after a hot shower and I had just applied apple cider vinegar and the coconut oil mixture to the rash. This had made this rash flare up because normally it is never that red. When not inflamed by vinegar it is much less visible and is a light pink to light red color. If the blanchable theory rules out versicolor, I will try the treatment that you suggest. Any idea how to prevent this from happening? I have never been allergic to anything and I am not using anything new. I can help sweating at the gymnasium or work, but lately, I tried extra strength full body antiperspirants (after rash not before), which help a little.