Typically, this is caused by the liver dumping something. This happens because you’re losing lots of fat, and toxins are stored in your fat. As they come out of the system, these toxins can cause a rash. The solution? Consume more vegetables. Also, try bentonite clay. This clay attracts toxins by pulling them toward itself, and it is excreted through the stool. 
Hi Stacey, I can’t give medical advice and definitely recommend following your doctor’s recommendations. You can ask him/her if low carb would be better suited for you. Also, you may want to double check with him/her if the kidney concern was related to high protein, because that is a common misconception about keto – it is not a high protein diet/lifestyle.

By cutting carb intake significantly, we can drastically reduce insulin resistance, the precursor to type 2 diabetes. In addition, low carb diets, along with exercise, can be very effective at helping alleviate the symptoms and progression of type 2 diabetes. Beyond that, ketosis itself is appetite-suppressing, meaning your hunger will naturally check itself, increasing your caloric deficit and making you lose fat even faster.
Keep up electrolytes. The major electrolytes in our bodies are sodium, potassium and magnesium. Because a low carb diet (especially a keto diet!) reduces the amount of water you store, this can flush out electrolytes and make you feel sick (called “keto flu”). This is temporary, but you can avoid or eliminate it by salting your food liberally, drinking broth (especially bone broth), and eating pickled vegetables. Some people also choose to take supplements for electrolytes, but it’s best to first consult a doctor that understands and supports keto/low carb lifestyles.
So, we have a situation where the body has way too much insulin in the blood—yet the insulin is not able to do its job in the cells, either. The cells are resisting it. As a result, the body keeps making more and more insulin. These hormones are on a constant feedback loop, sending and receiving messages of “Sugar is high—release more insulin. . . . Must lower blood sugar for the body to stay alive.”
Achieving ketosis is a pretty straightforward, but it can seem complicated and confusing with all of the information out there.4If you want to learn more about ketosis and the scientific process around it, you can visit a very in-depth discussion about on Dr. Peter Attia’s website. Here’s the bottom line on what you need to do, ordered in levels of importance:
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