I can't believe im readking the above about in general food not causing external skin symptoms...is this a joke.  Of course they do, sure you will have heard of the typical internal reactions like coughing, difficulty breathing etc but there are the more common external reactions like hives, itching, mouth and face swelling from food.  I suffer from allergies to food ie sugar and mayonnaise make me break out in hives, so do seafood (more hives accompanied by vomiting and fever).  My friend's lips swell and she gets an itchy throat from eating prawns.  My father consumed a crap load of mangoes when he was younger and suddenly developed an allergy to them, the mango sap makes his skin swell in blisters and the smell makes him ill not to mention the mango flesh and juice itself.

I would forget seeing a doctor avoid these foods completely esp seeing Splenda is bad for your health to begin with and if at all eat very little refined foods and focus on making fruits and fresh raw and cooked veg a big part of your diet, it's helped me immensley.

Yes you can.   Splenda can cause many bad reactions.   I know several people including my husband who had adverse reactions to Splenda.   Don't use it.  It's a poison to your body.   Look up reactions to Splenda on the internet.  You'll understand what I'm saying is true. 

As a pediatrician and Splenda fan, I would have been skeptical about Splenda causing an itchy rash - except that I recently had a moderately severe red rash on my back with more pruritis (itchiness) than I've had in decades, and I could not figure out why. And, fortuitously, happened to run into a blog site about Splenda causing itchy rashes from a multitude of flabbergasted Splenda users. There are also more reliable sites that note, in a more muted tone, that Splenda can cause itchy rashes. My itchy rash was so problematic that I just stopped using Splenda out of desperation to stop the problem. I already use loratadine (Claritin generic) daily. I used Eucerin Calming Shower Oil and hydrocortisone on my back, which helped sooth the itch. The rash resolved. But one harried morning, I chugged down a canned coffee. Several hours later, I couldn't figure out why my back was pink and itchy again! I checked the can's label: Splenda! And I now realize not only was the rash due to Splenda, but I had developed months of progressive gas pain and bloating - which I just assumed was part of my accelerated aging process. But, come to think of it, the gas problem is so much better since I've stopped Splenda! (Bummed . . . I like this stuff that's 600X sweeter than sugar!)

Just out of curiosity, how long were you using Splenda before you got the rash on your back? 

 Ive been using Splenda basically 5 days a week for the better part of 1.5 years and in the last week or so have run into rash like symptoms exactly like most people on this page.  Also found many other pages with almost everybody saying they haven't found anything that worked (doctors, dermatolgists, creams, ointments, antihistamines, steroids, etc). The only thing that I have found that seems definite is to stop using Splenda.  It seems like I would have noticed something sooner if this was really it. 

I was using Splenda regularly for well over one year. Against my better judgment about an artificial sweetener, I was probably up to four packets per day. As a physician, I will say that developing an allergy after regular use for so long is not the more common scenario - but it can happen. You've probably heard people say, "I've developed an allergy to . . . !" One day, they will likely elucidate the mechanism of this latent Splenda allergy. Bummer that I stocked up on so much Starbucks bottled Lite Mocha Frappuccino's . . . and I seriously miss all that sweetness in my morning tea!!! But the Splenda back rash was so horrible that I'm avoiding Splenda "like the plague"!!! The best solution is to stop ingesting Splenda. My rash was slow to resolve, looked terrible, and was very ITCHY! (I probably already said that Eucerin Calming Shower Oil Wash and applying hydrocortisone (or a stronger steroid) immediately applied after a bath or shower helped take the edge off for me. I take loratadine (Claritin), but diphenhydramine HCl (Benedryl generic) or other anti-histamine may help decrease the rash and the itch (particularly prescription hydroxyzine or Atarax). Probably most physicans are not aware of Splenda rashes. I felt lucky to somehow see some blog comment about it, by chance. Good luck! :)

As a pediatrician, I can tell you that plenty of my patients have "itchy" eczema exacerbations as a result of food allergies. Some of these patients outgrow this.

Thank you for the url. I now have a probable answer to why I have had insomnia, incredibly itchy skin and almost panic attacks.

Thank you so very much.

Cyndi B