Red dots on your hands can come from a surprisingly wide range of causes, from tiny broken blood vessels to allergic reactions to insect-related skin conditions. Most are harmless, but a few patterns deserve prompt attention. The key to narrowing it down is paying attention to the size of the dots, whether they itch, and whether they fade when you press on them.
The Glass Test: Your First Step
Before anything else, try this simple check. Press the side of a clear drinking glass firmly against one of the red dots and look through the glass. If the dot fades or disappears under pressure, it’s a blanching rash, which points toward conditions like allergies, eczema, or general skin irritation. If the dot stays red, purple, or brown even under pressure, it’s non-blanching, meaning blood has leaked out of tiny vessels into the skin. Non-blanching dots have a different and sometimes more serious set of causes.
Petechiae: Tiny Non-Blanching Dots
Petechiae are pinpoint red or purple dots, typically 1 to 3 millimeters across, caused by bleeding from tiny capillaries just under the skin’s surface. They aren’t raised, they don’t itch, and they don’t hurt. You might notice them after straining hard (heavy lifting, intense coughing or vomiting), which temporarily spikes pressure in small blood vessels and causes a few to burst. This type is usually harmless and clears up on its own.
Petechiae can also appear as a side effect of certain medications, particularly blood thinners and some antibiotics. Low platelet counts, whether from a viral infection or another blood-related condition, are another common trigger. If you’re seeing petechiae crop up frequently without an obvious physical cause like straining, that’s worth investigating with a blood test.
When Petechiae Signal an Emergency
A rash of petechiae that spreads rapidly and comes with fever, a fast heart rate, stiff neck, or confusion can indicate a serious bloodstream infection. In particular, invasive meningococcal disease produces a rapidly spreading petechial rash alongside high fever and declining alertness. This combination requires emergency care. Petechiae alone, without fever or other systemic symptoms, are far less concerning.
Cherry Angiomas
If the red dots on your hand are smooth, round, bright red, and slightly raised, they may be cherry angiomas. These are small clusters of blood vessels that form a visible bump on the skin’s surface. They commonly appear after age 30, and by age 75, roughly 75% of adults have at least some. The exact cause isn’t fully understood, but aging, hormonal changes during pregnancy, and genetic factors all play a role. Cherry angiomas are completely benign and don’t require treatment unless they bleed from getting snagged or you want them removed for cosmetic reasons.
Spider Angiomas and Liver Health
Spider angiomas look different from cherry angiomas. They have a central red dot with thin, branching lines radiating outward, resembling a tiny spider. If you press on the center, the lines briefly disappear and then refill. A single spider angioma is usually nothing to worry about. Several of them, especially combined with other signs like yellowing skin, fatigue, or abdominal swelling, can point to liver problems.
About one-third of patients with liver cirrhosis develop spider angiomas. Alcohol-related liver disease is a particularly strong predictor: cirrhosis patients with a history of heavy drinking were roughly 3.5 times more likely to have spider angiomas than those without. If you’ve noticed multiple spider-shaped red marks appearing on your hands and you have risk factors for liver disease, it’s worth getting liver function checked.
Contact Dermatitis
Red dots or bumps on your hands that itch, burn, or feel tender often point to contact dermatitis, an inflammatory reaction triggered by something your skin touched. The hands are the most common site because they contact so many potential irritants throughout the day. Common culprits include dish soap, cleaning products, fragrances, preservatives in lotions, and metals like nickel (from jewelry, coins, or tools). The rash typically stays confined to the area that made contact with the irritant.
Irritant contact dermatitis, the more common type, can happen to anyone with enough exposure. Allergic contact dermatitis is an immune reaction specific to you and can flare up even from brief contact once your body has become sensitized. Both types cause redness, small bumps or blisters, and itching. Identifying and avoiding the trigger is the main treatment. Switching to fragrance-free soap or wearing gloves when cleaning often resolves the problem within a week or two.
Scabies
If the red dots on your hands itch intensely, especially at night, and you notice them concentrated between your fingers or along your wrists, scabies is a possibility. Scabies is caused by microscopic mites that burrow into the top layer of skin. The hallmark sign is a short, wavy, grayish line on the skin surface, which is the actual burrow. Around these burrows you’ll typically see small red bumps, tiny blisters, or pustules.
The hands and feet are the most common sites in adults, with the spaces between fingers, the fleshy base of the thumb, and the inner wrists being especially favored locations. The itch comes from your immune system reacting to the mites and their waste, which is why it tends to worsen over time and gets particularly bad at night when your skin warms up under blankets. Scabies spreads through prolonged skin-to-skin contact, so household members and close contacts often need treatment at the same time.
Hand, Foot, and Mouth Disease
Red spots on the palms of your hands, sometimes with small blisters, alongside sores in or around your mouth and spots on the soles of your feet, suggest hand, foot, and mouth disease. This viral infection is most common in young children but absolutely affects adults. In adults, the pattern can be atypical: lesions sometimes start in or around the mouth before spreading to the hands and feet, which is the reverse of the typical childhood progression where the extremities are affected first.
The spots are usually flat or slightly raised, may develop into small blisters, and can be mildly painful. The illness is caused by a group of enteroviruses and typically resolves on its own within 7 to 10 days. It’s most contagious in the first week, spreading through saliva, blister fluid, and stool.
How to Tell These Apart
- Flat, tiny (1 to 3 mm), not itchy, doesn’t fade under pressure: petechiae, from broken capillaries or a blood-related issue.
- Smooth, round, bright red, slightly raised: cherry angioma, especially if you’re over 30.
- Central dot with radiating lines: spider angioma. Multiple ones warrant a liver check.
- Itchy, red, possibly blistered, appeared after contact with a product: contact dermatitis.
- Intensely itchy (worse at night), between fingers, with faint gray lines: scabies.
- Red spots on palms plus mouth sores: hand, foot, and mouth disease.
If your red dots are small, few in number, painless, and stable, they’re most likely benign. If they’re spreading, accompanied by fever, or causing severe itching that disrupts sleep, those patterns point toward conditions that benefit from a clear diagnosis and targeted treatment.