https://www.amazon.com/dp/B004VGIGVY/ref=cm_sw_r_cp_apa_fabc_TPTY6HZSHW4Z72QV0KGZ
Currently this with the uv light off. Looks like there was a batch with bad electrical components that generatrd a bunch of bad reviews but I've had mine for 3+ years now with no issues. Without the uv light its basically just a fan with a carbon prefilter and a hepa filter.
I really like Hello, (I use their strawberry toothpaste for kids), it's SLS free, has fluoride, free of other allergens, and is vegan and cruelty free. It's not as cheap as buying a ton of Colgate from Costco, but a good deal for this category of product and cheaper than the sensodyne you mentioned.
Because your doctor wasn't specific, it's probably environmental allergies. You said you don't react to pollen, but it's literally tiny, invisible in the air all the time, from trees, grades, weeds, etc. I can sniff a flower with no problem, bit the pollen you do to see blowing off a tree is a problem.
This time of year, environmental allergens are terrible for me. Today, the counts for ragweed, chenopods, and grass pollens are high by me. I've been feeling it all week.
It's possible you're allergic to pollens. Check out https://www.weatherbug.com/life/pollen/ or a similar site. When your allergies act up, check it. You start to notice a pattern, like your react when tree pollen is high, etc.
Then, you can use that to know when to expect trouble (the seasons when your pollens are highest). During those times, you create a regimen of meds that work, like a pill (Claritin or Zyrtec, for instance) and/or a prescription nasal spray. If you have a set regimen, you avoid the worst of it instead of trying to take meds to fix it after it gets bad.
I did have allergy testing, which confirmed the pollens I react worst to and clarified that walnut tree, not tree pollen in general, is one of my issues.
For people with environmental allergies, dust can also be an issue. So if you react in a home in the winter, it doesn't rule out environmental allergies.
Here's an example
All Health All Health Advanced Fast Healing Hydrocolloid Gel Bandages, Regular 20 ct | 2X Faster Healing for First Aid Blisters or Wound Care, 20 Count https://www.amazon.com/dp/B07D1CT9DX/ref=cm_sw_r_apan_glt_fabc_F2H4CNKP6HA942SPN9YK?_encoding=UTF8&psc=1
just bought this Winix and love it's features filters can be bought 3rd party for cheap on Amazon....highly recommended. I did my research on these also. am very happy with this one....your Dad will be too auto mode turns regular mode into night mode automatically when light in room dims...
Winix 5300-2 Air Purifier
https://www.amazon.com/dp/B01D8DAYBA?ref=ppx_pop_mob_ap_share
Besides the medication you should also look at your diet.
I get a feeling of something in my throat as symptom of reflux, luckily following the Fast Tract Diet as well as removing most foods I had intolerances to has cleared this symptom.
Medications can treat symptoms and help your body heal but ultimately its important to look at the root causes of problems.
I found one of these in black on my local Craigslist: https://www.amazon.com/Coway-AP-1512HH-Mighty-Purifier-White/dp/B01728NLRG/ref=mp_s_a_1_3?adgrpid=107476663118&dchild=1&gclid=Cj0KCQjw1PSDBhDbARIsAPeTqrfZDGKOPlXR0Kcp5sJHNjwlT1fEBfiw8rRV19l9JnxtVcyM5-rlTB0aAmyLEALw_wcB&hvadid=455672717... I paid$75.00 for it. The filters need replacement 2-3 times per year. There are more highly rated ones, but this had the better wife approval factor.
ADS/ADMS are denaturing agents specifically designed for use against dust mites.
https://www.amazon.com/Allersearch-ADS-Anti-Allergen-Dust-Spray/dp/B000RWFFHY
Using a half-face respirator with HEPA filters would be a good idea. It also protects well against Covid-19.
It works very well to keep out pollen.
I sleep wearing a full-face respirator with HEPA filters. This particular respirator was designed for comfort, and it's comfortable enough to sleep in.
It might not help you find the exact cause but i think a small room air purifer like this is a win win. Less dusting to do, sheets need changing less regularly, noise helps me sleep, i snore less and less stuffed up in the mornings.
I tried to use Allerless allergy relief capsules, it helps me to keep down histamine level in body & now I don't have complain with any kind of allergy in my body. I use to take 2 capsules everyday as per advice from my physician