You are not imagining it. The chronic pain, the crushing fatigue, and the feeling that your own body is fighting against you are real. If you developed these symptoms after your military service, you might be right to think they are connected, as autoimmune conditions can be linked to service but are often denied. Find out how to connect them to military exposure and strengthen your VA claim, because you deserve answers and the support you earned.
It can feel like an impossible fight. The VA wants concrete proof for conditions that even doctors do not fully understand, which often leads to denied disability claims. But there is a path forward, and proving your case is possible if you know what steps to take.

We are going to walk through how to build a VA disability claim that the VA cannot ignore. Many autoimmune conditions can be linked to service but are often denied. Find out how to connect them to military exposure and strengthen your VA claim right here.
What Are Autoimmune Conditions Anyway?
Think of your immune system as your body’s personal security team. Its job is to find and destroy invaders like viruses and bacteria. With an autoimmune disorder, the security team gets confused and mistakenly attacks your own healthy cells, tissues, and organs.
This friendly fire from where your body attacks healthy tissue can cause all sorts of problems. It leads to inflammation, pain, and damage throughout your body. There are more than 80 types of autoimmune disorders, and they can affect almost any part of you, which is why autoimmune diseases affect so many veterans.

These are not just minor aches and pains. They are life-altering medical conditions that can introduce severe functional limitations into your daily life. Getting the VA to recognize this connection is crucial for receiving the VA disability compensation you deserve.
The VA’s Stance and Why These Claims Get Denied
To get VA benefits, you have to prove service connection. This means showing that your current disability is directly related to your time in the military. For an autoimmune disease, this process gets tricky.
The biggest hurdle is that science has not pinpointed the exact cause for most of these conditions. The VA often falls back on this, saying your disease has an “unknown etiology” or cause. They may claim it is genetic or just bad luck, but not related to your veterans service, because the VA doesn’t always see the link.
For any disability claim, the VA is looking for three key things: a current diagnosis, an event or exposure in service, and a medical link (nexus) connecting the two. For autoimmune claims, that third piece, the nexus, is where things often fall apart. This is the challenge you have to overcome to get the disability rating you are entitled to.
Connecting the Dots: Military Exposures as the Link
This is where your story starts to take shape. While the VA might say the cause is “unknown,” a growing body of scientific research points to environmental exposures as powerful triggers for autoimmune diseases. Many of these toxic exposures are unfortunately common in military life.
You were there. You breathed the air, drank the water, and came into contact with things your body was never meant to handle. Let’s look at some of the most common military exposures that could be the key to your VA disability claim.
Burn Pits and Toxic Fumes

If you served in Iraq, Afghanistan, or other parts of Southwest Asia during the Gulf War era, you know all about burn pits. These massive open-air trash fires were used to get rid of everything from plastic and rubber to medical waste. The smoke they kicked up was a toxic cocktail of chemicals and particulate matter.
The PACT Act of 2022 was a huge step forward for veterans. It added several conditions to the “presumptive list” for burn pit exposure, meaning the VA automatically assumes they are service-connected if you served in certain locations and timeframes. This list of presumptive conditions made it easier for many to get the health care they needed.
While specific autoimmune diseases are not yet on the presumptive condition list for toxic exposure, the science connecting airborne pollutants to immune system dysfunction is strong. These toxins can trigger a constant state of inflammation in your body. For some people, this chronic inflammation can lead the immune system to go haywire and mistakenly attack healthy cells.
Contaminated Water Sources
The story of contaminated water at Camp Lejeune in North Carolina is a tragic and well-known example. For decades, service members and their families were exposed to industrial solvents like Trichloroethylene (TCE) and Perchloroethylene (PCE) in their drinking water. The Camp Lejeune Justice Act is one way this specific law helps veterans seek compensation.
These chemicals are linked to a host of health problems, including several cancers. Research also suggests a strong connection between these solvents and autoimmune conditions like systemic sclerosis (scleroderma). Even if you were not at Camp Lejeune, contaminated water has been an issue at other bases, so it is important to research your duty stations.
Agent Orange Exposure
For veterans who served in Vietnam, Thailand, or the Korean DMZ, Agent Orange exposure is a major concern. This powerful herbicide contained dioxin, a chemical known to cause a wide range of serious health issues. The VA has a list of presumptive conditions linked to Agent Orange, including certain cancers and Type 2 diabetes.
While specific autoimmune diseases are not on the main presumptive list, research continues to explore links between dioxin exposure and immune system dysregulation. A strong medical opinion can argue that your autoimmune disorder was at least as likely as not caused by this exposure. Evidence of your service in a location where Agent Orange was used is the first step.
Vaccines and Adjuvants

Vaccines are vital for protecting troops from infectious disease all over the world. But for some individuals, they might have unintended consequences. Your military service likely involved a heavy schedule of vaccinations, some of which were unique to military life, like the anthrax vaccine.
Some vaccines use substances called adjuvants to create a stronger immune response. Scientists are studying whether, in rare cases, this powerful stimulation can trigger an autoimmune reaction, a condition sometimes called Autoimmune/inflammatory Syndrome Induced by Adjuvants (ASIA). While this is a developing area of science, it is a legitimate topic to discuss with a medical expert when building your claim.
Infectious Diseases and Gulf War Illness
Sometimes an autoimmune disease can be triggered by an infection. During your service, you may have been exposed to various bacteria, viruses, or parasites you would not have encountered at home. An illness that seemed minor at the time could have set off a long-term autoimmune response.
For veterans of the first Gulf War, there is also the complex issue of Gulf War Illness. This is recognized by the VA as a chronic multi-symptom illness that can include chronic fatigue. Its symptoms, including joint pain, fatigue, and cognitive issues, overlap significantly with autoimmune conditions like chronic fatigue syndrome.
How to Strengthen Your VA Claim for an Autoimmune Condition
Now for the practical steps. Building a solid va claim is like being a detective. You need to gather clues and assemble them into a case that is impossible to deny.
Step 1: Gather Your Service Records
Your military records are the foundation of your claim. You need your DD-214 and your complete Official Military Personnel File (OMPF). You are looking for anything that places you at the scene of an exposure.
Dig for deployment records that show dates and locations. Find your job description or MOS, which could show you worked with chemicals or in hazardous areas. Look for any reports of known environmental hazards at your duty stations.
Step 2: Collect All Medical Evidence
Next, you need a paper trail of your health. Start with your Service Treatment Records (STRs). Did you complain about joint pain, rashes, or extreme fatigue while you were still in uniform? Even seemingly unrelated complaints can show the beginning of a pattern.
Then, gather all of your medical records from after you left the service. These records from VA doctors and private physicians document your diagnosis and ongoing treatment. You want to show a clear and continuous history of your symptoms from service until today, including the specific diagnostic code for your condition.

Step 3: Get a Strong Nexus Letter
This might be the single most important document in your entire claim file. A nexus letter is a medical opinion from a qualified doctor that connects your current autoimmune diagnosis to a specific event or exposure during your military service. A professional medical case evaluation is essential.
The letter cannot just say your condition is “likely” from service. It must be strong and well-reasoned, using phrases like “at least as likely as not” that your military exposures caused or aggravated your autoimmune disease. The letter should also cite scientific studies that support the connection.
Step 4: Write Compelling Buddy Letters and a Personal Statement
The VA needs to hear from more than just doctors. Statements from people who know you can be incredibly powerful. These are called “lay statements” or “buddy letters.”
Ask a spouse, parent, friend, or fellow service member to write a letter. They can describe what you were like before your symptoms started and how the condition has changed your life. They can confirm where you served and what you were exposed to.
You should also write your own personal statement. This is your chance to tell your story in your own words. Explain your duties, describe your exposures, detail how your symptoms began, and outline how the disease impacts your daily life and leads to functional limitations.
Potential Exposures and Linked Conditions
To help you organize your thoughts, here is a breakdown of potential connections you can investigate. The way the VA evaluates disease claims depends heavily on the evidence you provide.

Don’t Give Up if You’re Denied
It is a hard truth, but your initial disability claim may be denied. Do not let this discourage you, as many veterans seek an appeal. A denial is often just the beginning of the process when you file VA disability claims.
You have the right to appeal. You can file a Supplemental Claim with new and relevant medical evidence. You could ask for a Higher-Level Review, where a more senior VA employee takes a fresh look at your case, or appeals to the Board of Veterans’ Appeals.
The key is to keep fighting for the compensation you’re entitled to. Each denial letter from the VA will tell you exactly why they said no. Use that information to strengthen your case and try again to get the VA disability rating and benefits you need.
Conclusion
Connecting your autoimmune disease to your time in the service is a tough journey. It requires persistence, evidence, and a deep understanding of the VA system. But you are not alone in this fight, and the sacrifices a veteran living with these conditions made should be recognized.
Remembering that autoimmune conditions can be linked to service but are often denied. Find out how to connect them to military exposure and strengthen your VA claim is your first mission objective in getting the benefits you’ve earned. Your health, wellbeing, and financial stability are worth the effort.