DS says whenever he's at this Dad's house he gets very stuffy and itchy and sneezy...
His dad has two cats... They are the same cats we had when we lived together and DS was a baby.
I've been allergic to cats my whole life and I've found the best way for ME to deal with it (not saying this is for everyone) is to live with a bunch of cats. I actually think I'm a lot less sensitive to their dander because of it.
Can you develop allergies to something you've lived around your whole life?
I used to have three dogs growing up. Now I'm allergic to them. I can't be in the same room with them. If a dog owner smells like their dog my allergies act up. My cat allergy isn't as bad as my dog allergy, I have two cats.
His system probably changed and now he's allergic to the cats.
Someone told me that your system changes every seven years. I don't know how true that is, but...
If his allergy is bad he may need to carry medication with him.
I have also developed new allergies. I never had any when I was young. Nothing too bad, but I do notice my eyes begin to itch when my cats sit on my lap for too long, and my nose gets runny. I grew up with cats and never had a problem, but now, at 33, I have an allergy (albeit a minor one).
Trust is like paper. Once it's crumpled it can never be perfect again.
Allergies are just when the immune system is healthy and wants to "fight" something. In our hygienic society that's going to be inanimate microscopic objects that resemble proteins of bacteria, parasites and viruses. The other choice is the body fighting itself (autoimmune diseases).
The best treatment for allergies is to avoid the trigger. However we all live in the real world where that's often not possible.
Non med treatment:
Vacuum, dust, HEPA filters, plastic coverings for mattresses and furniture, avoid carpets, drapes, upholstery.
Ha ha. I'm a doctor with severe allergies and I can only manage the HEPA filter (although I have no drapes and I'll be tearing the carpet out within a year).
Steroid nasal spray: now over the counter: saw them at Costco today for 12 dollars per inhaler, a downright steal.
Second line: antihistamines: older are superior but have the dreaded drowsiness; take only at night or an acute attack; newer ones Claritan, Allegra, and Zyrtec should be ADDED to the nose spray
Third line: rx only Astelin (tastes God awful but works)
Fourth line: adding rx Singulair
Fifth line: allergy shots
Adjunct treatment: mucinex, pseudoehedrine, netipots, humidifiers, nasal saline
My oldest DS has many allergies (so do I ) . He generally doesn't go to the xwh very often. But when he does he comes home all sinusy and feeling horrible. He is highly allergic to dust mites. The kids have told me numerous times that dad and OW house is very dirty and dusty so I am guessing that is the reason or he's allergic to OW
Sadly, yes. I love fruit. At 18yrs old, I became allergic to 1 particular fruit. If I even smell it, my tongue gets itchy and starts to swell. I have to be careful in the grocery store, other people's homes, etc... Can you have him tested at an allergist?
Unfortunately he usually comes home with a headache and stuffiness that takes about a day to clear up.
Right now he's using Benadryl at night when he's over there.
I'm pretty sure it's the cats... because my house is kinda dusty and that doesn't seem to bother him much.
My mom was a horrible hayfever person, I mean the whole attack with sneezing uncontrollably for hours on end, and then about 4 years ago it wasn't as bad, and then 3 years ago nothing, and she has not had it since. she also used to be horribly allergic to cats, but can spend about 2 hours in my house before she starts reacting, whereas when we were younger she had to just walk in the door and the sneezing would start.
So Yah it's possible, but doesn't mean forever.
It's also not unusual to have something that is a known irritant not bother you, and then have it get you after some time away from it, ie the cat situation.
I would follow PJ's advice, and see if that doesn't help out.