Please take note that I am not a doctor and none of this information should be taken as medical advice. If you find yourself having severe effects, please contact a doctor immediately for treatment options.
Turmeric - or more importantly, curcumin
Is a plant from the ginger family found in Asia, often used for coloring of food as well as addition of flavor. It is very well known as a successful anti-inflammatory agent as well as an antioxidant. Curcumin is the main active ingredient in turmeric powders however it is said the percentage is quite low. For the full benefits, it is said to eat peppercorns (or with the addition of pepper in general) along with curcumin to be properly absorbed. Otherwise, adding more turmeric to your diet would give some impact enough to bring ease to symptoms. There are many other benefits of increasing turmeric in your diet than simply allergies, but I may touch on those another time. Turmeric is already found in most mustards as well as currys, which is how they get their yellow coloring. Turmeric powders are also readily available for additions to any dish and there are many available recipes online.
Hydrate, hydrate, hydrate!
Two known bad-guys are the main cause for allergies and they are allergens and histamines. The issue with histamines in the body however, is that they greatly impact the water flow within the body. One of the best things that can be done to fight back against the allergies is to properly hydrate. That amount of water can vary per person dependent on a number of factors. Even electrolytes could help push things along when added to water intake. There are many foods that contain electrolytes in a balanced diet as well.
Honey! more specifically, local honey.
Natural pollen is transmitted with the pollinators when visiting plants and creating that sweet honey. It is said that if a person regularly consumes local honey, they would be subjecting their bodies to smaller amounts of the allergens - a similar idea to how the flu shot works. This route supposedly works over time however, and does not always provide relief. Though, mixing a bit in with a warm beverage would ease the discomfort of an itchy throat!
Up the Vitamin C
Vitamin C is a well known antihistamine, antioxidant, and antitoxin. Many foods offer vitamin c naturally to add into diets - strawberries, oranges, citrus, lemons, grapefruit, papayas, and more!
Found in the stem of a pineapple, bromelain is a natural remedy for many things, including the horrendous allergies. It can be found in pineapple juice and is said to target many ailments of allergies including inflammation as well as bringing comfort to coughs or scratchy throats. Research has been done on the use of bromelain for allergies and asthma finding that it reduces allergic sensitization.
Spice it up!
This old method has been around for what seems like eternity (and maybe there's a reason for that?). These aromatherapy allergy remedies seem to revisit those of cold/flu remedies. Lavender, Peppermint, Rose, and Eucalyptus oils seem to be the more favored for opening the airways and bringing a calm sensation over the body. They all also have many other uses, even for topical treatments! Check out this article for more in depth information and the science behind it.
Natural herbs such as Elderflower, Goldenrod, Reishi, Horehound, Nettle, and so many more can often be incorporated into teas or side dishes. It is highly recommended to research as much as possible for many of them.
Protect the Home
Your home should be a safe-haven from the outside world. Do your best to keep bedding, furniture, clothing, and even pets clean from allergens. Line-drying can capture clinging pollen that will harbor itself in your home. Keep the eyes flushed with cool water to rinse allergens, bathe and wash clothes after coming in from outside. Keep pets clean as they easily track in all sorts of hazards. Carpet is a worst enemy for allergy season, keep vacuumed or pull it up all together. Another investment idea would be an air purifier.
Apple Cider Vinegar
It seems this vinegar is brought up fairly often for home remedies. It contains acidic levels that the body needs for natural pH, vitamins, among other things. There are many ways to incorporate more apple cider vinegar in the diet, and also brings loads of more benefits for the body other than allergy relief.
Cooling the Air
Surprisingly easily overlooked is one factor that creates a tragedy for allergy sufferers - cooling the air around us. The nice weather outside brings the urge to open windows and let in the nice, fresh air - however even with screened windows, allergens can easily enter the home through this route. Another overlooked hindrance would be the use of fans. It's often craved - and necessary to provide circulation with fans however any allergen that enters the space will only be blown about and scattered further.
Other well known forms to bring relief to ailments of allergies have been