Thanks for this question, and sorry to hear about your problem. There are many different kinds of things that can cause a rash, so it is important to speak with your doctor
. A rash with a crust over the top of the healing wounds is concerning for an infection that is caused by a bacteria. Some examples of this are called impetigo and erysipelas, where a small point of entry in the skin allows staph bacteria to get a hold and then spread. Either of those infections can be quite contagious, and require careful dressing and cleaning in addition to antibiotics to resolve appropriately. There are many other different things that can cause a similar infection, but the crust that you mention are quite often associated with a bacterial staph infection. While the bacteria is often NOT the cause of the problem, the fact that it is present almost everywhere means that it can quickly make the problem worse. When it does, it is important to get appropriate treatment. Now, with regards to what is causing your problem, it seems that it has been associated with waxing, which can traumatize the skin. You may want to avoid doing this until speaking with your doctor about what is causing your problem. Please speak with your doctor.