Some people don't have a reaction to PPD "Black Henna".  Some people get itching, others get blistering, some become very sick. 

Most doctors have heard of reactions to hair dye, but they are not aware that hair dye is used by street artists to make black temporary tattoos.  Tell the doctor that someone painted black hair dye on your skin, and the doctor will understand!

Print out http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1769532/ and show that to your doctor.  That medical article details the reaction and recommends treatment.

If your doctors aren't familiar with PPD Black Henna, and doesn't understand that the problem is PPD and not henna, recommmend that they also access: "Cutaneous Reactions to Temporary Tattoos" from " Dermatology Online Journal ", http://dermatology.cdlib.org/91/original/henna/wolf.html  .  This article accurately describes PPD Black Henna injuries, and provides information for diagnosias and treatment of them. Your doctor may give you something to help stop the itching and reduce the swelling, and that may reduce scarring.

You are now sensitized (will have strong allergic reactions) to para-phenylenediamine. Ask your doctor to tell you about this!  You are sensitized for the rest of your life.  There are many products you must avoid  because your body will react strongly to them and may endanger your life.  If your doctor doesn't know about this, go to an allergist and tell the allergist you have become sensitized to para-phenylenediamine.

Never dye your hair with chemical hair dye again.  If you do, this is what will happen!   The allergic reaction could kill you. You'll be able to safely dye your hair with pure henna or other plant dyes, but NOT synthetic dyes! 

To understand how PPD sensitization will affect your health for the rest of your life, please read this:

If you have become sensitized to PPD through a PPD "Black Henna" temporary tattoo, contact with the following may set off a nasty allergic reaction! You may have to avoid these if you have had a reaction to a PPD "black henna":
 PABA-based sunscreens or creams, Azo® or disperse textile dyes, other dye chemicals, Sulfa drugs, semi permanent hair dyes, some “caine” drugs such as benzocaine,  sulfonamides,  Para-aminosalicylic acid (p-aminosalicylic acid),  diaminodiphenylmethane (epoxy hardener), para-aminodiphenylamine (p-amino-diphenylamine),  paratoluenediamine (p-toluenediamine),   2,4-diaminoanisole,  ortho-aminophenol (o-aminophenol),  black rubber products,  and sulfones.

Talk to your doctor about this, especially if you have a prescription that ends in "-caine".

 You also may wish to avoid sunscreens or creams that contain PABA (para-aminobenzoic acid or p-aminobenzoic acid) and products containing benzocaine, since some people allergic to p-Phenylenediamine will react to these products. 

Inform your healthcare providers that you have a reaction to PPD black henna, indicating an allergy to para-phenylenediamine!
 

After you've been to the doctor, go to the person who did the PPD "Black Henna" and show them how much they have harmed you! 

See Health Canada's Rulings on Henna!  Canada has sensible legistation! Canada has made PPD "black henna" illegal and kept natural, traditional, safe henna legal, and defined the difference between the two!  Don't you wish your country had such a law outlawing what hurts people while protecting the ancient safe tradition of henna? Contact your legistators and show them Canada's ruling!