I have not had a C-Section myself and this is news to me that it has caused such a rotten bout of dehydration 🙁
Anyway I have researched dehydration before and should be easily able to source some info that might be helpful. When I was looking just now I saw this:
Apparently, you know you’re well-hydrated if you void large volumes of pale urine at least six times a day. How’s things in that department? Guessing OK, looking at the amount of water your already drinking.
Although sufficient water intake is critical in maintaining metabolism, it will not by itself correct existing surface dehydration.
Internal:
Ensure your body is not deficient in B vitamins, iron or essential fatty acids, all of which can cause some of the symptoms you are experiencing.
Vitamin A is also important for skin health. Ensure that your diet includes vitamin A rich ingredients like carrots, tomatoes, green leafy vegetables, whole grains and legumes.
Its important to include in your diet the right fats for cell metabolism etc such as cod liver oil, cold pressed organic virgin olive oil, coconut oil, fresh cold-water fish like salmon, and avocado’s.
You also need to get a good amount of vitamin E and protein in your diet.
You can also have a vitamin rich juice made up of 1 tbsp. of water cress, carrot and spinach juice, 2 tbsp. wheat germ oil, one glass of tomato juice, and 1 tbsp. of nutritional yeast.
Drinking coconut water is very useful for dehydrated skin.
External
Try keeping a hydrating facial mist on hand and spritz during the day as required, my favourite is Esthederm Cellular Water Spray and just looked up and see they also have a Cellular Water Cream, which could be ideal and Esthederm also have a Hydra System range especially for dehydrated skin. This brand is one I feel confident in recommending, although its expensive, it’s very effective.
You can also make your own facial spritz using your knowledge of essential oils, some of which have hydrating properties which wont alone combat the problem but will definitely help.
Coconut oil makes a great dry skin moisturiser.
The best moisturisers for dry skin should be oil-in-water emulsions containing natural moisturising factors such as amino acids, glucose or electrolytes. Protective creams with high lipid content and humectants containing glycerin or sorbitol are ideal. Keep in mind a moisturiser that includes glycerin, dimethicone & hyaluronic acid in its base.
Try a coconut oil deep conditioning mask for your hair, or even jojoba oil, to nourish and treat dry, damaged hair and lock in moisture, apply at least once a week.
Wash hair less often if possible.
Try using a humidifier in your bedroom when you sleep if the air could be contributing to the dehydration.
Lastly avoid things that can exasperate it such as hot showers, acne medication, face scrubs, foaming cleansers, alcohol-based cleansers and soap with alkaline will all rob your skin of moisture.
Well that was a bit of an essay haha, anyway hope at least some ideas might be of use or worth a try, got carried away looking at some pages and kept finding more info, lol;)
Keep us posted on how you get on 🙂