You can ask your Pharmacist for MSM capsules or tablets and increase your intake to 8 grams a day. MSM is a natural compound we ALL make in our bodies to overcome allergic responses (and a zillion other positive effects) Methyl Suphonyl Methane or Dimethyl Sulphone is the chemical name. That should do it nicely. I would even make a wash with a 10% dispersion of the crystals in water and use that to bathe the facial lesions.
The other sure-fire way to enjoy your dogs without inflammatory responses is to have a local Homeopath give you prepared Dog Hair in potency, or even make you up some 30C from your own dog's hairs. Take along about 5 grams of their mixed hair and dander so they can make up the specific remedy for you.