A patchy red-and-white pattern on your hands is usually caused by normal variations in blood flow through the tiny vessels in your skin. The most common explanation is a benign vascular phenomenon called Bier spots, where some small blood vessels constrict (creating pale patches) while others dilate (creating reddish areas), producing a mottled, spotted look. In most cases this is harmless, but certain patterns and accompanying symptoms can point to conditions worth investigating.
Bier Spots: The Most Likely Cause
Bier spots create a marbled pattern of irregular white patches against a red or slightly bluish background, typically on the hands, forearms, and sometimes the legs. They happen because neighboring blood vessels in your skin respond differently to the pressure of blood pooling: some vessels widen, letting more blood through and turning the skin red, while others clamp down, cutting off flow and leaving pale spots. The result looks like a scattered, uneven mix of red and white across your skin.
The hallmark of Bier spots is that they change dramatically with position. If you let your hands hang down by your sides, the mottled pattern becomes more obvious because gravity increases blood pooling in the veins. Raise your hands above your head for 30 seconds or so, and the spots fade or disappear entirely as blood drains back toward your body. You can also press on the skin around a white spot. If the entire area blanches to match and the pattern vanishes under pressure, that’s the classic sign of Bier spots.
Bier spots are completely painless and don’t itch, swell, or cause any other symptoms. They don’t require treatment. Some people notice them more on warm days or after exercise, when blood flow to the skin increases. If the pattern bothers you cosmetically, the simplest fix is to elevate your hands periodically, which reduces the venous pooling that makes them visible.
Raynaud’s Phenomenon
If your fingers (rather than the whole hand) change color in a distinct sequence, Raynaud’s phenomenon is a different possibility. In a Raynaud’s attack, blood vessels in the fingers suddenly spasm shut in response to cold or stress. The affected fingers first turn white as blood flow stops, then may shift to blue from lack of oxygen, and finally flush red as circulation returns. This sequence is usually accompanied by numbness, tingling, or throbbing.
Raynaud’s is different from Bier spots in several important ways. It tends to affect individual fingers rather than creating a scattered pattern across the whole hand. It’s triggered by specific events like grabbing something from the freezer or walking into an air-conditioned building. And it causes noticeable sensations: cold, numb fingers during the attack, then stinging or throbbing as warmth returns. Bier spots, by contrast, are painless and position-dependent rather than temperature-dependent.
Livedo Reticularis: A Net-Like Pattern
Sometimes the red-and-white pattern looks less like random spots and more like a lace or fishnet overlying the skin. This net-like appearance is called livedo reticularis. It happens when blood flow through small vessels slows unevenly, leaving a web of reddish-blue lines surrounding paler centers. Cold exposure, smoking, and emotional stress can all trigger it.
Mild livedo reticularis that comes and goes with temperature changes is usually harmless, especially in younger people. It’s common on the legs but can appear on the hands and forearms. The pattern typically fades when the skin warms up. If it doesn’t fade with warming, or if it appears suddenly and stays fixed, that’s a different situation worth medical attention (more on that below).
When the Pattern Signals Something Deeper
In a small number of cases, persistent red-and-white mottling points to an underlying condition affecting blood vessels or the immune system. A fixed, broken net-like pattern (called livedo racemosa) that doesn’t come and go with temperature is the version most associated with systemic disease. It appears in roughly 25% of people with antiphospholipid syndrome, a clotting disorder, and up to 70% of those who have antiphospholipid syndrome alongside lupus.
Autoimmune conditions linked to skin mottling include lupus, rheumatoid arthritis, dermatomyositis, and Sjögren syndrome. Vascular disorders like polycythemia vera, deep vein thrombosis, and various clotting deficiencies can also produce mottled skin. These conditions almost always come with other symptoms beyond the skin changes: joint pain, fatigue, swelling, unexplained blood clots, or skin ulcers.
Pay attention to these features that distinguish harmless mottling from something more serious:
- Pain or tenderness in the mottled areas, especially if it doesn’t go away
- Skin ulcers or sores developing within the discolored patches
- A fixed pattern that doesn’t fade when you warm your hands or raise them
- Numbness or weakness that persists beyond brief episodes
- Other systemic symptoms like joint pain, unexplained fatigue, or swelling
A Simple Test You Can Do Right Now
The quickest way to sort out what’s happening is the elevation test. Sit comfortably and let your hands hang down for a minute or two, noticing the pattern. Then raise both hands above your head and hold them there for about 30 seconds. If the red-and-white mottling fades significantly or disappears, you’re almost certainly looking at Bier spots or a similar benign vascular response.
Next, try pressing a finger firmly onto one of the red areas. If the color blanches away completely under pressure and the surrounding skin looks uniform, that’s another reassuring sign. Bier spots vanish with pressure because the color difference depends entirely on active blood flow, not on any permanent change to the skin itself.
If the pattern stays put regardless of position, pressure, or temperature, or if you’re experiencing pain, sores, or other symptoms alongside the discoloration, those are reasons to have a doctor take a closer look. They can check for underlying vascular or autoimmune conditions with blood tests and a physical exam. But for the majority of people noticing a spotty red-and-white pattern on their hands, the answer is a harmless quirk of how their small blood vessels respond to gravity and blood pressure.