Lumpy Skin Disease in Cows: Signs, Spread, and Prevention
- See your vet immediately if a cow develops fever, swollen lymph nodes, and multiple firm skin nodules, especially during warm insect season or after recent animal movement.
- Lumpy skin disease is a viral disease of cattle caused by a capripoxvirus. It spreads mainly through biting insects such as flies, mosquitoes, and some ticks.
- Common signs include fever, eye and nose discharge, drooling, painful skin lumps, leg or udder swelling, reduced milk production, and weight loss.
- Diagnosis usually requires your vet plus laboratory confirmation, most often PCR on skin lesions, scabs, or other samples, because other skin diseases can look similar.
- There is no single antiviral cure. Care focuses on isolation, supportive nursing, treatment of secondary bacterial infection when indicated by your vet, and herd-level outbreak control.
- Prevention centers on vaccination where available and permitted, insect control, movement control, quarantine of new or returning cattle, and fast reporting of suspected cases.
What Is Lumpy Skin Disease in Cows?
Lumpy skin disease, often called LSD, is a contagious viral disease of cattle caused by a capripoxvirus. It is known for causing firm, painful skin nodules along with fever and a sharp drop in comfort and production. Some cattle have mild disease, while others become weak, lose body condition, and develop severe skin damage.
The virus is highly host-specific and mainly affects cattle. In many outbreaks, the biggest losses come from reduced milk yield, weight loss, hide damage, infertility problems, and time out of production, not just death. Mortality is usually lower than morbidity, but individual animals can become very sick.
This is also an important reportable foreign animal disease concern in places where it is not established. That means a suspicious case is not something to watch at home. Your vet and animal health officials may need to be involved quickly so testing, isolation, and herd protection can start right away.
Symptoms of Lumpy Skin Disease in Cows
- Fever
- Firm, round skin nodules
- Swollen lymph nodes
- Eye tearing and nasal discharge
- Drooling or hypersalivation
- Edema of the legs, brisket, or udder
- Reduced milk production
- Weight loss and poor appetite
- Ulcers, scabs, or skin sloughing
- Lameness or reluctance to move
See your vet immediately if you notice fever plus multiple skin nodules, especially if more than one cow is affected or insects are heavy on the farm. Fast action matters because several conditions can mimic lumpy skin disease, and some regions treat it as a foreign animal disease that needs rapid reporting.
Worry increases when a cow also has udder swelling, trouble walking, mouth or nose lesions, rapid milk drop, or open skin wounds. Calves, thin animals, and cattle with heavy secondary skin infection may need more intensive supportive care.
What Causes Lumpy Skin Disease in Cows?
Lumpy skin disease is caused by lumpy skin disease virus, a member of the capripoxvirus group. The virus spreads mainly through blood-feeding arthropods, especially biting flies, mosquitoes, and some ticks. That is why outbreaks often worsen during warm, wet periods when insect pressure is high.
Direct spread between cattle can happen, but insect transmission is thought to be the main driver in most field outbreaks. Virus may also be present in skin lesions, scabs, saliva, nasal secretions, and other body materials, which is one reason sick cattle should be separated and handled carefully.
Risk goes up when cattle are moved between farms, commingled at markets, or introduced without quarantine. Dense housing, poor insect control, and delayed recognition can all make herd spread harder to contain. Because this disease has major trade and regulatory implications, your vet may recommend immediate isolation and official reporting if LSD is suspected.
How Is Lumpy Skin Disease in Cows Diagnosed?
Your vet will start with a physical exam and herd history, including recent animal movement, insect exposure, vaccination history, and how quickly lesions appeared. The skin nodules can be very suggestive, but appearance alone is not enough to confirm the disease.
Definitive diagnosis usually relies on laboratory testing, most often PCR on skin nodules, scabs, biopsies, or other appropriate samples. In some cases, histopathology or virus isolation may also be used. Lab confirmation is important because other conditions, including pseudo-lumpy skin disease caused by bovine herpesvirus 2 and some bacterial skin diseases, can look similar.
If you are in a country or region where LSD is not normally present, your vet may involve state or federal animal health authorities right away. That can feel stressful, but it helps protect your herd and nearby farms by speeding up testing, movement guidance, and outbreak control.
Treatment Options for Lumpy Skin Disease in Cows
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Prompt exam by your vet
- Isolation of affected cattle
- Basic supportive nursing care
- Fly and mosquito control measures
- Wound cleaning and monitoring
- Targeted medications only if your vet feels they are needed for pain, inflammation, or secondary infection
Recommended Standard Treatment
- Full veterinary exam and herd risk assessment
- PCR or other diagnostic testing
- Isolation and movement guidance
- Supportive care plan for hydration, nutrition, and comfort
- Treatment of secondary bacterial infection when indicated by your vet
- More structured insect control and sanitation plan
- Follow-up rechecks to monitor healing and production impact
Advanced / Critical Care
- Urgent veterinary oversight for severe or complicated cases
- Extensive diagnostics and repeat testing as needed
- Aggressive supportive care for weak, dehydrated, or non-ambulatory cattle
- Management of severe wound complications, edema, or lameness
- Intensive nursing, nutrition support, and frequent reassessment
- Coordination with animal health authorities for outbreak response
- Herd-wide emergency vaccination or control planning where available and permitted
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Lumpy Skin Disease in Cows
Bring these questions to your vet appointment to get the most out of your visit.
- What other diseases could look like this, and which tests do you recommend first?
- Does this need to be reported to state or federal animal health officials right away?
- Which samples should be collected for PCR, and how long will results likely take?
- Should I isolate this cow, the whole pen, or stop animal movement on and off the farm?
- What supportive care steps matter most for comfort, hydration, and milk production?
- Do any lesions look secondarily infected, and does this cow need treatment for that?
- What insect control plan is most practical for my barns, pastures, and handling areas?
- Should the rest of the herd be vaccinated or monitored differently based on local rules and availability?
How to Prevent Lumpy Skin Disease in Cows
Prevention works best when it combines vaccination, insect control, and movement management. In areas where lumpy skin disease is present or at risk, vaccination with appropriate live attenuated products has been one of the most effective outbreak-control tools. Your vet can help you understand what is available, permitted, and appropriate in your region.
Because biting insects are major spreaders, focus on reducing exposure. That may include manure and standing water management, strategic use of approved repellents or insecticides, screens or fans where practical, and timing handling to avoid peak insect activity. These steps do not eliminate risk, but they can lower transmission pressure.
Quarantine new, returning, or recently transported cattle before mixing them with the herd. Watch closely for fever, discharge, or skin nodules during the quarantine period. Good records, rapid separation of suspect animals, and early veterinary involvement can make a major difference.
If you are in the United States or another region where LSD is considered a foreign animal disease concern, prevention also means reporting suspicious cases quickly. Fast reporting protects your herd, neighboring farms, and the broader cattle industry.