The following information may help to address your question:
Emotional stress, thermal burns, ultraviolet rays, and infections have also been reported as triggers for pemphigus vulgaris.
While in many cases the exact cause of pemphigus vulgaris remains unknown, several potentially relevant factors have been identified.
Pemphigus is not contagious. It does not spread from person to person. Though there can be a genetic predisposition to develop pemphigus, there is no indication the disease is hereditary.
We are not able to comment on whether you have always had pemphigus vulgaris or if it has been in remission. What we do know is that it occurs almost exclusively in middle-aged or older people. In addition, research studies suggest a genetic predisposition to the disease.
Normally, our immune system produces antibodies that attack viruses and harmful bacteria to keep us healthy. In people with pemphigus, however, the immune system mistakenly attacks the cells in the epidermis, or top layer of the skin, and the mucous membranes. The immune system produces antibodies against proteins in the skin known as desmogleins. These proteins form the glue that keeps skin cells attached to keep the skin intact. When desmogleins are attacked, skin cells separate from each other and fluid can collect between the layers of skin, forming blisters that do not heal. In some cases, these blisters can cover a large area of skin.
It is unclear what triggers the disease, although it appears that some people have a genetic susceptibility. Environmental agents may trigger the development of pemphigus in people who are likely to be affected by the disease because of their genes. In rare cases, it may be triggered by certain medications. In those cases, the disease usually goes away when the medication is stopped.
We recommend that you speak with your doctor regarding questions you may have regarding your case.