
Applying a cold compress to the eye can help to alleviate fluid retention. This can be used for up to twenty minutes. Tea bags can be used to reduce fluid retention. A cold metal facial rolled can also prove to be beneficial.
Salt and sodium
Fluid retention is a condition where fluid builds up under the eye. You can reduce salt and sodium intake to soothe irritation and swelling. You should avoid salty processed foods and other packaged foods. Water is essential to flush out sodium from your body. According to the American Heart Association, adults should not consume more than 1,500 mgs of salt each day. However, most Americans consume up to twice that amount.
Although there are several factors that can cause fluid retention under one eye, the most common one is a high salt intake. It can be caused due to poor sleep quality, allergies or hormonal changes. Sodium is also found in processed foods, canned beans and fatty meats. This condition can also be caused by a high intake of processed foods.
Allergies
An allergy is one of many causes of swelling around the eyes. Angio-oedema can occur in severe cases. This condition causes the skin around the eye to swell up and cause pain and itching. It can also be affected in other areas, such as the hands and feet. An allergy or infection can trigger it. It can also be passed down from one generation to another.

You might be allergic to certain chemicals or foods. You may also be allergic to dust or pet hair. Avoiding allergies is the best way to prevent them.
Sun exposure
Sun exposure can be a problem if you have sunburns or under-eye bags. The sun's UV radiations are damaging to the skin. They also break down collagen, elastin and other important nutrients. These proteins are essential for skin structure and firmness. Prolonged exposure to the sun also depletes the skin of essential moisture and causes sagging. This can lead to slight under-eye swelling.
Sun exposure can also lead to a condition known as photokeratitis, a temporary eye condition caused by exposure to the sun's ultraviolet rays. This inflammation causes damage to the cornea, which covers the inside of the eyelid and the white tissue. People who live in high-altitude areas are particularly vulnerable to this problem. Living in high-altitude areas is more likely to be exposed to UV rays. They can cause temporary damage to the eye and may impair vision. The good news about UV-B radiation is that they are absorbed into the ozone layer so are not as damaging to eyes.
Blockage of tear tubes
It is possible to treat a blocked tear duct under one eye. There are several surgical and nonsurgical treatments that can be used to open up these ducts. To determine the best treatment for your problem, consult a doctor.
Treatment options for blocked tear ducts are dependent on the cause of the condition and may include surgery to remove the blockage. Other options include medication and protective eyewear.

Anaphylactic shock
A medical condition called anaphylaxis occurs when the body's immune system attacks an allergen. Anaphylaxis can result in shortness or complete loss of consciousness. This serious medical condition requires immediate attention and treatment. Anaphylaxis affects about one in 50 people in the United States. However, some studies suggest that the actual incidence may be even higher. The symptoms may appear within 5 to 30 minutes after the allergen is exposed. In rare cases, the reaction might take longer.
Fluid can buildup in body tissues when the body's immune systems is overwhelmed. This can cause the eyes to swell. Anaphylaxis could be due to allergies to food or medications. An allergic reaction can cause wheezing and difficulty swallowing.