If consuming any amount of dairy triggers sinus headaches that cause difficulty in concentrating, you may have a milk allergy. Dairy products are considered one of the most common food allergens that can trigger inflammation in various parts of the body. Sinus congestion may cause trouble concentrating because of a symptom called cognitive dysfunction or simply "brain fog." Avoid dairy products until you can be seen by your health care provider because severe allergic reactions can result in death.
Dairy Allergy
Your sinus headaches may be related to a dairy allergy. Milk is found in a wide range of products, some obvious and others not so obvious. Common products that contain dairy include cheese, ice cream, custard, butter and whipped cream, but other foods may contain milk such as lunch meats, salad dressings and baked goods. If you’re allergic to milk, your immune system malfunctions when it comes into contact with milk proteins and overreacts, treating the proteins as if they were dangerous. Various chemicals are created throughout the body that causes common milk allergy symptoms.
Sinus Headaches
Sinus headaches are a common symptom of nasal congestion that can develop within a few minutes of ingesting dairy. Histamine is a chemical released in the sinuses during a milk allergy that increases blood flow, causing inflammation and swelling in the sinus cavities. A sinus headache causes pain to develop throughout the face and head, such as in your eyes, back of the neck, upper teeth, inner ear and cheek bones. Most sinus pain is the worst when you first wake up or when you stand up suddenly, according to the University of Maryland Medical Center. Sinus headaches place pressure on the head, which can also lead to facial tenderness.
Brain Fog and Concentration
Brain fog is a non-medical term used to describe mental confusion or lack of mental clarity, according to Lawrence Wilson, M.D. Histamine released in the brain typically causes greater mental clarity and wakefulness, but sinus pressure can counteract this action. Taking certain antihistamines such as diphenhydramine can suppress the central nervous system, causing extreme fatigue and mental fogginess.
Treatment
If you accidentally ingest dairy proteins, talk with your doctor about taking an oral antihistamine and decongestant. Antihistamines work by blocking mast cells production of histamine, which reduces inflammation and increased mucus production. Decongestants restrict the amount of blood that is allowed into your sinus cavity, alleviating congestion. An extreme allergic reaction can lead to death if you develop anaphylaxis, which can cause symptoms, such as the inability to breathe, a sudden drop in blood pressure and shock.
