Gulf War Illness Presumptive Conditions: The Full List and How to Claim Them

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Many veterans who served in Southwest Asia came home with lasting symptoms that medicine has struggled to explain: fatigue, joint and muscle pain, headaches, digestive problems, trouble with memory. VA has a special set of rules for these veterans. It is the one area of VA disability where you can be compensated without a clear diagnosis.

Note that for VA purposes the “Gulf War” period began on August 2, 1990, and has not ended. It covers Desert Storm veterans and those who served in the region in the decades since.

Qualifying Gulf War service

For undiagnosed and unexplained illnesses, service on or after August 2, 1990, in:

• Afghanistan, Bahrain, Egypt, Iraq, Israel, Jordan, Kuwait, Oman, Qatar, Saudi Arabia, Syria, Turkey, the United Arab Emirates
• The neutral zone between Iraq and Saudi Arabia
• The Arabian Sea, Gulf of Aden, Gulf of Oman, Persian Gulf, and Red Sea
• The airspace above these locations

For infectious diseases, the list is narrower and includes Afghanistan only on or after September 19, 2001. Check VA.gov for the exact list.

The PACT Act expanded these locations in 2022 and relaxed earlier limits on when symptoms had to appear. VA’s current guidance does not list a cutoff date for symptoms to begin.

Gulf War illness presumptive conditions

“Presumptive” means VA assumes your Gulf War service caused the condition, so you do not need a doctor to link it to service. The presumptive conditions fall into three groups:

Each group has its own rules, explained below.

1. Undiagnosed illness

Chronic symptoms that doctors cannot attribute to any known diagnosis after examination and testing. Signs and symptoms can include:

• Fatigue
• Skin problems
• Headaches
• Muscle pain
• Joint pain
• Neurological symptoms
• Neuropsychological symptoms, such as memory and concentration problems
• Respiratory symptoms
• Sleep disturbances
• Gastrointestinal symptoms
• Cardiovascular symptoms
• Abnormal weight loss
• Menstrual disorders

2. Medically unexplained chronic multisymptom illness

Diagnosed conditions defined by a cluster of symptoms, without a conclusively known cause:

• Chronic fatigue syndrome
• Fibromyalgia
• Functional gastrointestinal disorders, including irritable bowel syndrome and functional dyspepsia

3. Presumptive infectious diseases

Malaria can also qualify later if consistent with its incubation period.

The six-month rule

The illness must be chronic, meaning it has existed for six months or more. Symptoms that come and go count, as long as the pattern of episodes covers at least six months. The six months is measured from the earliest date the symptoms appeared.

Why these claims get denied

Gulf War illness claims have historically had high denial rates. The usual reasons:

• The examiner assigns a diagnosis. If the examiner attributes your joint pain to arthritis, it is no longer “undiagnosed,” and the presumption does not apply. The claim then needs a regular nexus.
• The examiner says the cause is known. For example, attributing fatigue to sleep apnea or depression.
• The wrong exam is ordered. VA has a specific Gulf War general medical examination. If only a narrow exam was done, the symptom cluster may never have been assessed as a whole.
• Symptoms are not documented over time. One visit does not show a chronic condition.

How to build the claim

1. Get your symptoms into the record, repeatedly. See a doctor about each symptom and return over months. Six months of documented, unexplained symptoms is the core of the claim.
2. Let the testing be done. Normal test results help here. They show the symptoms are unexplained.
3. Keep a symptom log. Dates, symptoms, severity, and what you could not do.
4. Write a detailed personal statement covering when each symptom began after deployment and how it has continued.
5. Get statements from family about changes since you returned. See buddy statements.
6. Ask for a diagnosis where one fits. If your symptoms match fibromyalgia, chronic fatigue syndrome, or IBS, a formal diagnosis puts you squarely in the presumptive category.

How to file a Gulf War illness claim

File VA Form 21-526EZ. In describing the condition, say that you are claiming it as an undiagnosed illness or medically unexplained chronic multisymptom illness due to Gulf War service. List each symptom. See the filing guide.

How Gulf War illness is rated

Since there may be no diagnosis, VA rates the condition by analogy, under the diagnostic code for the condition it most resembles. Examples:

Fibromyalgia covers widespread pain along with fatigue, sleep disturbance, stiffness, and related symptoms, so VA will not also rate those same symptoms separately.

Also check the burn pit presumptions

Many of the same veterans are covered by the PACT Act for respiratory conditions and cancers linked to burn pits and airborne hazards. The two sets of rules are separate, and you can qualify under both for different conditions.

If you were denied

Read the exam report. If the examiner assigned a diagnosis with little basis, or gave a cause without explanation, a private medical opinion addressing that point can support a Supplemental Claim. If your condition has since been diagnosed as fibromyalgia, chronic fatigue syndrome, or IBS, that diagnosis is new and relevant evidence. See what to do after a denial.

Registry exam

The Gulf War Registry health exam is free and separate from the claims process. It records your exposures and health concerns. It does not start a claim, but the findings can be used as evidence.

Last reviewed October 2026. This guide is general educational information, not legal or medical advice, and this site is not affiliated with the Department of Veterans Affairs. Rules and rates change. Confirm details on VA.gov or with an accredited representative. See our disclaimer and editorial policy.