Lactate Dehydrogenase Deficiency: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Lactate Dehydrogenase Deficiency?
A primary care doctor usually manages care first. Many patients also see a neurologist, who treats nerve and muscle problems, or a geneticist, who specializes in inherited conditions. A nephrologist may help if the kidneys are affected. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What it is
Lactate dehydrogenase deficiency is a rare inherited condition affecting an enzyme that helps the body turn sugar into energy during hard exercise. Without enough of it, muscle cells cannot make energy the normal way during intense activity. One form affects the muscles and comes from changes in a gene called LDHA; a much rarer form affects the brain and comes from changes in LDHB.
Symptoms
Most people with the muscle form feel fine at rest. Problems show up during or after intense exercise, such as sprinting or heavy lifting, with muscle pain, stiffness, and weakness. Hard exercise can sometimes cause muscle breakdown, releasing myoglobin into the blood. This can strain the kidneys, and urine may turn dark or reddish brown, which needs prompt care.
Causes and who gets it
The condition is genetic and follows an autosomal recessive pattern: a person must get one changed copy of the gene from each parent. Carriers usually have no symptoms. Symptoms often first appear in childhood or the teen years, when exercise becomes more demanding.
How doctors diagnose it
A doctor starts with a medical history and physical exam, asking about muscle pain after exercise and any dark urine. Blood tests can check for muscle damage and kidney stress, and genetic testing can confirm the diagnosis.
Treatment
There is no cure. Care focuses on preventing symptoms and protecting the muscles and kidneys. Most people are told to avoid intense or sudden exercise, while gentle, steady activity is often easier on the muscles. Staying hydrated helps protect the kidneys.
When to see a doctor
See a doctor if exercise regularly causes muscle pain, weakness, or stiffness that lingers. Get care right away if urine turns dark after exercise or muscles become very weak and swollen, since these can mean muscle breakdown that could harm the kidneys.
How a direct primary care or concierge doctor fits in
A direct primary care doctor is paid with a flat monthly fee instead of insurance billing; a concierge doctor works similarly but usually costs more and often works alongside insurance. Either type can order tests, give exercise guidance, and refer to specialists when needed.
Common questions
Can people with this condition exercise at all?
Most people can do gentle, steady activity like walking. Intense or sudden exercise is usually the problem. A doctor can help each person find a safe level.
Is lactate dehydrogenase deficiency the same as high LDH on a blood test?
No. High LDH on a routine blood test usually means tissues somewhere in the body are stressed or damaged. Deficiency means the body makes too little working enzyme, which is a different situation.
Can it be passed to children?
Yes, it can be inherited. When both parents carry one changed copy of the gene, each child has a chance of having the condition. Genetic counseling can help families understand the chances.
Does it shorten life?
Most people with the muscle form do well when they avoid triggering severe episodes. The rare brain form is more serious. Outcomes differ from person to person.
Sources
- MedlinePlus Genetics - Lactate dehydrogenase deficiency
- MedlinePlus - Lactate Dehydrogenase (LDH) Test
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
