Hey Danny,
Thanks for the update on Mike's progress. I'd hoped, as I'm sure the two of you did, that he would be CH pain free by now. The good news is it appears this regimen is working... so we're getting closer to a complete pain free response.
Fortunately, there are more things to try. For starters I would continue the Benadryl (Diphenhydramine) every four hours and before bed for another week. I'd also add a 1000 mg tablet of vitamin C every four hours along with the Benadryl throughout the day. That may sound like a lot but Linus Pauling took 18 grams of vitamin C a day and lived to 93 !
Vitamin C is a great antiviral, antibacterial and antioxidant agent so it covers the bases so to speak in case there's a low level infection brewing away or inflammation from any source... It's also great for the cardiovascular system. Our bodies lack the enzyme to synthesize vitamin C so we need to obtain it from dietary sources or from supplements. Everyone should take at least 2 grams a day...
There's a video of Dr. Linus Pauling giving a lecture on Preventing illness and disease with vitamin C at the following link.
Multimedia File Viewing and Clickable Links are available for Registered Members only!! You need to

or
I think you'll find this video very informative and humorous as well as he pokes serious fun at the very low vitamin RDAs recommended by the Food and Nutrition Board of the Institute of Medicine...
I would also add a 1000 mg capsule of Turmeric (Curcumin) a day with food. Curcumin is another wonder supplement that also aids in quelling inflammation. It has a long list of health benefits.
The next thing is to start drinking a half-cup of baking soda tonic 4 times a day an hour after eating (so as not to interfere with digestion) and before bed. You make this tonic with a teaspoon measure of baking soda in a cup (8 oz) of water.
The rational for the baking soda tonic is CH is pH sensitive... If systemic pH gets too low (too much acid), this condition triggers vasodilation which favors nearly all CH triggering mechanisms. The sodium bicarbonate will elevate systemic pH making it more alkaline.
While we're on water... make sure Mike is drinking at least 2.5 liters of water a day... CHers tend to become dehydrated and that makes it easier for the CH beast to jump ugly...
I'd also start a course of probiotic and continue taking it until the bottle is empty. Dealer's choice on the brand... I look for the best bang for the buck/pound in terms of Billions of live probiotic cultures.
The rationale for taking the probiotic deals with building or recolonizing the friendly symbiotic colonies of bacteria and biota living in our GI tracts called the microbiome. If the microbiome is happy, we're usually healthy. We keep it happy by feeding it with its favorite foods, fermented veggies like kimchi, Sauerkraut and picked veggies.
If the microbiome is unhappy or damaged... we have health problems... Any of you remember getting loose as a goose after taking an antibiotic... that likely wiped out your entire microbiome?
The microbiome functions as an important part of our immune systems, so it's important to keep it healthy as most of the antigens that make it into our bodies ride on the food we eat...
There's also a Gut-Brain Axis of communication either direct through the Vagus nerve or through chemical messengers. Sending the wrong messages from the gut to the brain causes problems...
Finally, there's diet... No sugars of any kind... No artificial sweeteners including Stevia. Sugars tend to brew the wrong cultures of bacteria in the microbiome and artificial sweeteners act as a poison... No gluten and if you must eat bread, make sure it's organic and NON GMO.
Try to eat organic NON GMO whole food produce, fruits, dairy products and nothing from a can if at all possible. Look for free range organic meats, chicken and eggs as well as wild caught fish. There's no telling what feed lot cattle, farmed fish and farmed shrimp are being fed.
Why NON GMO? Monsanto has developed genetically modified seeds that grow crops that are "Roundup Ready." Roundup (Glyphosate) is a herbicide. Roundup Ready crops can be sprayed with this herbicide to kill weeds but it doesn't kill the genetically modified crop.
Invariably, these crops take up the Glyphosate. Most of the corn, wheat, barley, soy and other grains grown in large farming consortiums are now Roundup Ready crops... Some of these grains and corn are used to make cooking oils. Some are used to feed cattle and dairy herds... See where this is going?
Monsanto scientists say that Glyphosate is non-toxic to all mammalian biological functions and is only toxic to plants not genetically modified to be "Roundup Ready" and this is true...
Guess what??? Our microbiomes are members of the plant kingdom and for sure, are not Roundup Ready...
On that note... take care and watch what you eat.
V/R, Batch