Lumpy Skin Disease in Cows
- See your vet immediately. Lumpy skin disease is a serious, reportable viral disease of cattle that can spread quickly and may trigger state or federal animal health response.
- Common signs include fever, enlarged lymph nodes, eye and nose discharge, reduced milk production, and firm skin nodules that can become painful, ulcerated, or infected.
- There is no single antiviral cure. Care focuses on isolation, herd-level disease control, supportive nursing, fly control, and treatment of secondary bacterial infections when your vet recommends it.
- In the United States, any suspicious pox-like or lumpy skin outbreak in cattle should be treated as a foreign animal disease concern until proven otherwise.
- Typical on-farm veterinary and testing cost range is about $300-$1,500 for an individual workup, while herd response costs can rise from $2,000 to $25,000+ depending on testing, biosecurity, vaccination access, labor, and losses.
What Is Lumpy Skin Disease in Cows?
Lumpy skin disease (LSD) is a contagious viral disease of cattle caused by a capripoxvirus. It is known for causing fever and firm skin nodules, but the illness can also affect lymph nodes, mucous membranes, milk production, fertility, and overall condition. Some cattle have mild disease, while others become severely ill, lose weight, develop painful skin damage, or die.
This disease matters because it is both an animal health problem and a herd management emergency. Outbreaks can reduce milk yield, damage hides, lower reproductive performance, and create major movement and trade restrictions. In areas where the disease is not established, a suspicious case may be handled as a foreign animal disease investigation.
LSD is not considered a human health threat, and it is highly host-specific to cattle and water buffalo. Still, if your herd has cattle with sudden fever and widespread skin nodules, rapid veterinary involvement is essential. Early recognition helps protect the affected animal, the rest of the herd, and neighboring farms.
Symptoms of Lumpy Skin Disease in Cows
- Fever
- Firm, round skin nodules
- Enlarged lymph nodes
- Eye discharge and tearing
- Nasal discharge and excess saliva
- Drop in milk production
- Swelling of the legs or brisket
- Lameness or reluctance to move
- Skin ulcers, scabs, or necrotic plugs
- Weight loss, depression, or poor appetite
When to worry: immediately. Fever plus multiple firm skin nodules in cattle is not a wait-and-see problem. Contact your vet right away, isolate affected animals if you can do so safely, and limit animal movement, shared equipment, and visitor traffic until your vet advises next steps.
Severe cases may include widespread lesions, marked swelling, lameness, mastitis, pneumonia, infertility, or secondary bacterial infection. In countries such as the United States, where LSD is not established, suspicious cases should be approached urgently because other reportable or foreign animal diseases can look similar early on.
What Causes Lumpy Skin Disease in Cows?
Lumpy skin disease is caused by lumpy skin disease virus (LSDV), a member of the Capripoxvirus genus. The virus primarily affects cattle and water buffalo. It is very stable in skin lesions and can persist in scabs and damaged tissue for extended periods, which helps outbreaks continue once the disease enters a herd.
Spread is thought to occur mainly through biting insects, especially flies, mosquitoes, and some ticks. Direct contact can also play a role, and the virus has been detected in secretions such as nasal discharge, tears, milk, and semen. That means animal movement, breeding material, contaminated equipment, and close herd contact can all matter in outbreak control.
Risk rises during warm, wet, insect-heavy periods and anywhere cattle movement is frequent. Because several other conditions can mimic LSD, including dermatophilosis, pseudo-lumpy skin disease, insect bite reactions, and some pox-like diseases, your vet will need to sort through the different possibilities before making herd recommendations.
How Is Lumpy Skin Disease in Cows Diagnosed?
Your vet starts with the history, herd pattern, travel or import risk, insect exposure, and a careful skin exam. The appearance of fever with widespread firm nodules is strongly suspicious, but appearance alone is not enough. Other diseases can look similar, especially early in the course of illness.
Confirmation usually relies on laboratory testing, most commonly PCR on skin nodules, scabs, biopsies, or other appropriate samples. Histopathology and virus isolation may also be used. In a suspected outbreak, your vet may work with state or federal animal health officials to determine which samples to collect and where they should be submitted.
Because LSD is a reportable, foreign animal disease concern in the United States, diagnosis is not only about the individual cow. It is also about protecting the herd and the broader cattle industry. Your vet may recommend immediate isolation, movement restrictions, insect control, and official reporting while test results are pending.
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
- Immediate veterinary exam and official reporting guidance if LSD is suspected
- Isolation of affected cattle and pause on animal movement
- Basic supportive care such as shade, easy water access, palatable feed, and wound hygiene
- Targeted treatment for secondary bacterial skin infection if your vet recommends it
- Basic fly and biting insect control around sick animals and housing
- Monitoring temperature, appetite, milk production, and lesion progression
Recommended Standard Treatment
- Full veterinary workup with sample collection for PCR or other official testing
- Structured isolation and movement control plan for the herd
- Prescription pain relief, anti-inflammatory care, and antimicrobial therapy for secondary infections when indicated by your vet
- Routine wound care and nursing support for ulcerated or necrotic lesions
- Herd-wide insect control program and sanitation review
- Milk production, fertility, and body condition monitoring
- Coordination with state or federal animal health authorities on quarantine, tracing, and vaccination strategy where applicable
Advanced / Critical Care
- Repeated veterinary rechecks and advanced supportive care for severely affected cattle
- Aggressive management of dehydration, severe pain, lameness, mastitis, pneumonia, or deep secondary skin infection as directed by your vet
- Hospital-style nursing support or intensive on-farm treatment setup
- Expanded laboratory testing and differential diagnosis workup
- Comprehensive outbreak management with strict biosecurity, tracing, vector control, and regulatory coordination
- Vaccination campaign planning in regions where approved outbreak control vaccination is available
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.
- Based on these lesions and fever, how concerned are you about lumpy skin disease versus other look-alike conditions?
- Does this need to be reported immediately to the State Animal Health Official or USDA as a possible foreign animal disease?
- Which samples should we collect for PCR or other testing, and how quickly can results come back?
- What isolation and movement restrictions should we start today for affected cattle, pen mates, and the rest of the herd?
- What supportive care is most useful for this cow right now, including pain control, wound care, hydration, and nutrition?
- Do any lesions look secondarily infected, and if so, what treatment options make sense?
- What insect control steps are most important on our farm during this outbreak risk period?
- How should we monitor milk production, fertility, and long-term skin healing in recovered cattle?
How to Prevent Lumpy Skin Disease in Cows
Prevention centers on biosecurity, insect control, early detection, and rapid reporting. Limit unnecessary animal movement, quarantine new arrivals, avoid sharing needles and equipment between animals without proper sanitation, and keep good records for purchases, breeding material, and transport. During insect season, reducing standing water, manure buildup, and fly pressure can help lower transmission risk.
If cattle develop fever and new skin nodules, involve your vet right away. Quick recognition matters because herd spread can happen before the full picture is obvious. In the United States, suspicious pox-like or lumpy skin disease should be treated as a reportable foreign animal disease concern until testing says otherwise.
Vaccination is one of the most effective outbreak-control tools in regions where LSD is present and approved vaccines are available. Your vet and animal health officials can advise whether vaccination is part of the local response plan. Prevention is rarely one single step. It works best when vector control, movement control, surveillance, and veterinary guidance all happen together.