Patient Spotlight: Life-threatening rash, or harmless side-effect of a margarita?


Patient Spotlight: Life-threatening rash, or harmless side-effect of a margarita?

Most of my patients come in with typical skin conditions (eczema, moles and acne), and the treatments are pretty standard and well-known. However, when someone does come in with a more unique case, it often leads them to think of the worst-case scenario. After years of experience practicing dermatology, I’ve learned to quickly diagnose the difference between a standard rash and a life threatening condition - this can help put a patient's mind at ease, or guide us to put together an immediate action plan. Let me share the first of a series of these stories we call “Patient Spotlight”.

Dr. Paru Chaudhari

Published Aug 12, 2019

A few years ago, a 25 year old patient walked into my office with a new rash. Upon examination, there were well-demarcated reddish-brown linear yet irregular thin plaques on her left hand. She explained that the marks had appeared out of the blue a week ago, and she had been anxiously waiting to find out why. She was really worried that this could be something serious, as her family had a history of skin cancer and other serious ailments. I looked and felt her hand, and then asked a question that took her by surprise: “Had you by chance been using limes or drinking margaritas prior to onset of the rash?” She replied, “Well, I was in Central Park on Cinco De Mayo having a few drinks with some friends. And, yes, maybe the lime juice did drip on my hand outside while sitting in the sun.”

“Had you by chance been using limes or drinking margaritas prior to onset of the rash?”

This patient did not have something life threatening, she had phytophotodermatitis, essentially a photosensitive eruption that is caused from contacting light-sensitizing furocoumarins (found in limes, lemons, celery, parsnips, and even figs) combined with long-wave ultraviolet.

In that instance, her rash was an indicator of a non-life threatening condition; however, some physical symptoms can be a sign of more acute medical conditions. If you came into my office with one leg that was swollen and redness and pain that was spreading, we’d be worried about a cellulitis induced by staphylococcus aureus. If both legs were swollen with redness, however, then we’d be looking at your heart or your kidneys not being able to balance water properly anymore. The most fascinating part of dermatology is that your patients could see it too and share in the process of diagnosis.

“Our job as dermatologists is to help heal your skin in its entirety.”

In my training, this is what I found fascinating about dermatology, how you could often see what was going on the inside of a body by simply looking at the outside. No tests, no labs, just eyes and your skin.

The process of treating skin conditions is not just limited to the skin, however. More than just treating a topical issue, it is also our job to address the patient as a whole. As your skin is the largest organ of your body, you need to treat it comprehensively - physically, mentally and emotionally. That’s why we created KitavaMD - to allow more people, not just our patients, a chance at a comprehensive solution for their acne.


Dr. Paru Chaudhari, a co-founder of natural skincare brand KitavaMD, is a practicing Board-Certified Dermatologist with a focus on inflammatory conditions such as acne and rosacea. She spent several years in private practice in New York City where she also served as an Instructor in Clinical Dermatology at Columbia University. She has been published in several peer-reviewed Dermatology journals and books. Dr. Chaudhari lives in the San Francisco Bay Area.

Medical Disclaimer: The content of this blog is not intended to be a substitute for professional medical advice, and is for educational purposes only. Recommendations should not be used in place of the advice of your physician or other qualified health care provider. KitavaMD does not provide medical advice, nor is this blog intended to create a doctor-patient relationship