
I had an allergic reaction 2 days ago - the first I've had in a long time. I was struggling to breathe, but I remembered that drinking water had alleviated other reactions I'd had some years back, so I drank at least half a liter of water & took a pinch of salt.
It all calmed down very quickly.
I recognise that I have been very dehydrated for a long time so have started implementing the Water Cures protocol as per their website. I do have the book ‘Your Body's Many Cries for Water' & must dig it out & read it again to remind myself.
I did go through a period of drinking 2-3 liters of water daily, some time ago, but was not taking any salt. It didn't seem to make much difference. I was also pretty low in Potassium back then, but now eat a mostly plant-based diet, with quite a bit of raw food so do get more potassium now.
The unrefined salt is needed to provide electrolytes & trace minerals so the body can use the water properly. So much improvement can be gained when the body is properly hydrated.
Address Dehydration

You must must must try the water cure and its various aspects. Sinus/allergies and aching joints are classic signs of dehydration.
I used the water cure successfully to rid myself of most allergy symptoms I even started having asthma symptoms which went away in two days of drinking sufficient water. You need 1/2 your weight in ounces of water and a little unrefined sea salt per day the pink Himalayan is great. You also need iodine, I used kelp and then later Lugol's solution. Magnesium, I use magnesium oil. The rest of what you need you will most likely get from your food. The water has made a huge difference for others who I have recommended it to.
One lady is off daily doses of Benadryl. Now she only takes it as needed. I am off of Zyrtec. I have stopped needing antibiotics 4 to 6 times a year! This has been a huge life change for me! I am about to turn 40 and I am so proud of taking control of my own health!