Can COVID-19 cause a rash?
Yes, COVID-19 can be associated with skin rashes, but these findings are uncommon and highly variable. Research indicates that while skin manifestations have been documented in association with SARS-CoV-2 infection, they occur in a minority of cases and lack the specificity needed for diagnosis. A rash alone cannot confirm that a person has COVID-19, nor can it reliably identify which variant of the virus may be present.
The appearance of a rash can coincide with COVID-19 in several ways. It may appear before other symptoms develop, emerge alongside fever or respiratory distress, or show up after the initial illness has subsided. Because these skin changes are not unique to SARS-CoV-2, they frequently overlap with reactions to medications, responses to other infections, or unrelated dermatological conditions. While a rash can be a notable feature of the disease, it is not a diagnostic marker in itself.
What COVID-associated rashes can look and feel like
COVID-19-associated rashes present in several distinct patterns, each with different sensations and visual characteristics. Understanding these variations helps in recognizing when a skin change might be linked to the virus, though visual inspection alone remains insufficient for confirmation.
Common inflammatory patterns include maculopapular or morbilliform eruptions, which resemble a measles-like rash. These often appear as flat red spots or small, raised bumps that can spread across the body. Urticarial eruptions, or hives, appear as raised, itchy welts that may shift location over time. Vesicular eruptions present as small, fluid-filled blisters.
Chilblain-like lesions are another recognized pattern, often referred to as “COVID toes.” These typically manifest as red or violaceous (purple-hued) spots on the fingers or toes. They are frequently painful or itchy and have been reported primarily in children, adolescents, and young adults who may have had mild or no other systemic symptoms. On darker skin tones, these lesions may appear more purple, blue, or dark brown rather than bright red, and swelling may be more prominent than discoloration.
Vascular-appearing lesions, including petechiae (tiny red or purple dots), purpura (larger bruise-like spots), and livedoid patterns (net-like or mottled discoloration), indicate changes in blood flow or bleeding under the skin. These differ from inflammatory rashes in their mechanism and often require closer clinical evaluation. While some rashes may itch or burn, vascular lesions are more likely to be associated with discomfort from swelling or tissue changes.
When a rash may appear and how long it may last
There is no single, predictable timeline for when a COVID-19-associated rash may occur or how long it will persist. The timing varies significantly depending on the specific type of skin manifestation.
Urticarial and vesicular eruptions may appear before, during, or after the onset of systemic symptoms such as fever, cough, or fatigue. Chilblain-like lesions have frequently been reported to appear later in the course of infection, sometimes weeks after the initial exposure or onset of other symptoms.
The duration of these rashes is also variable. Many reported lesions, particularly the inflammatory types like maculopapular or urticarial eruptions, tend to resolve spontaneously within a few days to a few weeks. There is no fixed recovery period that applies to all cases. Persistence beyond a few weeks, recurrence after resolution, or worsening of the rash should prompt reassessment, as these patterns may indicate an alternative cause such as a medication reaction, a secondary infection, or a separate dermatological condition.
COVID-19 and Skin Rashes
Why COVID-19 may affect the skin
The exact biological mechanisms by which SARS-CoV-2 affects the skin are not fully settled, and the condition does not directly cause every reported skin lesion. Proposed explanations primarily involve immune-mediated inflammation and vascular injury. The body's immune response to the virus may trigger inflammatory pathways that manifest on the skin, while the virus's impact on blood vessels may lead to the vascular patterns seen in some cases.
A rash appearing during or after a COVID-19 illness may not be caused by the virus itself. Many eruptions are instead the result of medication reactions to treatments taken for COVID-19 symptoms, responses to other concurrent viral infections, or the flare-up of pre-existing skin conditions such as eczema or psoriasis. Because the causal link between SARS-CoV-2 and specific skin morphologies is not established for every pattern, clinicians consider a broad range of potential triggers when evaluating a patient.
How to distinguish COVID from other possible causes
Distinguishing a COVID-19-associated rash from other conditions is challenging because the visual appearance of many rash types is not unique to the virus. No single rash pattern can confirm or exclude SARS-CoV-2 infection.
Several common alternatives must be considered when a rash appears in the context of a respiratory illness or exposure. Medication reactions are a frequent cause of new rashes during infection. Other viral illnesses, such as those causing hand-foot-and-mouth disease or enteroviruses, can produce similar blistering or maculopapular eruptions. Bacterial or fungal infections, eczema, contact dermatitis from new products or fabrics, heat rash, and ordinary cold-induced chilblains are also plausible explanations.
Testing for SARS-CoV-2 can provide contextual information, particularly if the patient has other compatible symptoms or known exposure, but a positive test does not automatically mean the rash is caused by the virus. A negative test does not rule out a COVID-19-related rash if the test was taken outside the window of detectability or if the rash appeared after recovery. Clinical assessment relies on integrating the rash's appearance with the patient's full medical history, recent medication use, and exposure timeline, rather than relying on visual diagnosis alone.
What to do about a new or uncomfortable rash
When dealing with a new or uncomfortable rash, conservative measures are appropriate for symptom relief while avoiding interventions that might worsen the condition or obscure diagnosis.
Avoid scratching the affected area, as this can lead to secondary bacterial infection and scarring. Use cool compresses to soothe itching or burning sensations. Steer clear of harsh soaps, fragrances, or other potentially irritating products on the affected skin.
Before using over-the-counter medicated creams, antifungal treatments, or antihistamines, consult a clinician or pharmacist, especially if you are pregnant, treating a child, managing chronic health conditions, or taking other medications. If you suspect a medication reaction, do not abruptly stop taking a prescribed medication without professional guidance, as this could pose risks to your underlying health.
Help your clinician by documenting the rash's progression. Note when it first appeared, how it has changed, and whether it coincides with other symptoms like fever, cough, or fatigue. Record any new medicines, supplements, or topical products introduced recently, as well as potential exposures to sick contacts or new environmental allergens. This information helps distinguish between a viral-associated rash and other causes.
When a rash needs prompt or emergency medical care
While most COVID-19-associated rashes are not dangerous and resolve on their own, certain features require prompt or emergency medical attention.
Seek prompt clinical assessment if a rash rapidly spreads, becomes very painful, blisters extensively, shows signs of infection (such as warmth, pus, or increasing redness), or presents as marked purple or bruised-looking changes that do not blanch (turn white) when pressed. These features may indicate vascular injury, severe inflammation, or secondary infection that requires professional management.
Emergency evaluation is necessary if the rash is accompanied by serious systemic symptoms. These include difficulty breathing, swelling of the face or tongue, confusion, inability to remain awake, or severe chest pain. In children and adolescents, persistent fever accompanied by rash, bloodshot eyes, gastrointestinal symptoms, or swollen hands and feet warrants immediate medical evaluation, as these may signal multisystem inflammatory syndrome, a rare but serious condition that can occur after SARS-CoV-2 infection.
Not every rash associated with COVID-19 is an emergency, but recognizing these warning signs ensures that serious complications are identified and treated without delay.