I have had similar experiences to what you describe, and the last time I got seriously depressed was when I tried following the advice of various paleo types who think eating a lot of tubers is okay. Thankfully, I knew it was the carbohydrates.

Yes, that is caused by carbs and sugar from last night. Its not because those are evil, but because it was sudden change. It might be caused by evil gluten tho, not carbs. You probably had sugar surge [euphoria] then sugar drop [irritability/depression].

If you want to do that, I advise you to have regular cheat day. how

To fix it, go do some sports or exercise. You can take a very cold shower, 5 - 10 minutes, as cold as you can [ or contrast shower ].

You may try to add cinnamon next time to your sweets or after it, in coffee for instance.

I'm the same way -- lifelong severe, non-responding atopic dermatitis (meaning that it no longer responded to any drug therapy including steroids) DID respond to an ancestral diet with high fats (50% to 70% - and only animal fats like lard, butter, schmaltz, ghee; plus less then 20% coconut oil or macadamia nut oil) , relatively low carbohydrates (around 10-20%), and moderate protein (20-30%), as long as I'm careful about what I eat. If my intestines don't like it, neither does my skin. lol

I find that I can't do "cheat days" where I have SAD foods -- 'cause they make me s-a-d. Yes, I have a noticeable crash in mood when I eat grains and refined sugar. (Informationally, I also have it if I drink fruit juice or eat a lot of apples, pears, etc.). Instead, I eat a widely varied diet where the foods fluctuate over time -- and I include things like sweet potatoes, winter squash, berries of all kinds, coconut nectar, and cacao in there regularly... AND red wine on occasion, too!

I'd keep track of what you're eating and how your body feels over time. You'll start to recognize patterns after a while that will show you how what you're putting into your body is affecting it.

One of the biggest opponents to the Paleo diet is a trainer named Lyle McDonald. he's one of those exercise gurus who analyze "science" and lends no credence to evolutionary/emotional theories. He eats a shit ton of carbs, is thin as hell (he's like a 40 something inline skater) and suffers from depression...

If you have skin problems, you should really consider doing a good quality natural liver detox. The liver has over 500 functions, including dealing with fat, carbs, cholesterol, deals in part with metabolism, is the bloods filter and detoxifier... so over the years all that junk food we eat, the air pollution, the chemicals in our cleaning products and everything else overwhelm the liver, becoming toxic, which is kind of ironic since it is the main detoxifying organ. When this happens it becomes sluggish, and excess toxins can continue circulating in the blood. Another organ that detoxifies the body is the skin. You can see when someone is detoxifying their liver because sometimes this results in skin rashes, but they subside. Drinking lots of water will help the toxins pass through the urine - ensuring you have good bowel movements (2-3 a day is ideal) will help toxins leave that can't be urinated. If you detoxify your liver, make sure you are getting decent bowel movements, because if you don't, the toxins in your bowels will just get reabsorbed into the blood stream again. This is important when doing any detox. And drinking lots of water is very important, too, to keep the blood clear. When you lose weight, you detoxify from toxins that are stored in fat. They are released into the blood. So in a way, losing weight is a way of detoxifying in and of itself, and may be contributing to your skin problems.

Eating a lot of good fats and oils is essential for healthy skin and hair, not to mention brain function. I use coconut oil on my skin all the time. When I first did it, I broke out - it wasn't because of the oils (the oils in coconut oil do not clog pores anyway) - it was because it was so effective for me that it pulled all the toxins out of my skin, causing an eruption. I continued using the coconut oil to detoxify from the skin eruptions. When they subsided, I had clear, radiant skin. I also eat a diet rich in good fats, and I detox regularly. People think I'm ten years younger than my biological age.

What also helps with overall health, including your skin, liver, and so on, is your colon health - if the colon is unhealthy, your skin can reflect that. A good, natural colon cleanse (detox) might be in order. Find a natural formula that contains l-glutamine that will heal any damage in your gut - I like the cleanses by Renew Life because they contain support nutrients, healing agents (like l-glutamine), nutrients that soothe and protect the intestines and their lining. Try to find a formula that contains antimicrobial nutrients which will kill the bad bacteria. Bad bacteria produce toxins that are absorbed into your blood - so even if you eat a healthy diet, your blood can still receive way too many intestinal toxins from a previous overgrowth of bad bacteria. Then drink some kefir which contains 5 billion good bacteria (with more bacterial strains than yogurt to boot) per tablespoon, which will help colonize the colon and small intestine with good bacteria and fight off the bad guys. If your colon is not clean and functioning optimally, toxins will be absorbed into the bloodstream and make the liver work harder to detox your blood. In fact, it is the main reason our livers are sluggish and toxic in the first place. So I always encourage a colon detox before the liver detox happens.

I hope this helps!