White spots on your phone screen: what they are and what to do

A white spot appears on the screen, brightest on a pale background, and the hope is that it is a glitch that a restart will clear. It will not, because it is not in the software. On most phones with an LCD screen the picture is lit from behind by a thin sheet that spreads the light of a few LEDs evenly across the panel. Press hard enough on one point — a key in the same pocket, sitting on it, a drop onto a corner — and that sheet dents or a speck of dust gets between its layers. From then on that one point throws light forward more strongly than the area around it, and you see a spot. Knowing that explains why it does not move, why it does not respond to settings, and what the repair has to replace.

LCD or OLED changes the whole answer

Find out which kind of screen the phone has before diagnosing anything; the maker's specification page says, and the phone's own settings often name the display type. An LCD is lit from behind by a backlight and shows black as a very dark grey, which is why pressure spots are an LCD problem. An OLED has no backlight: every pixel makes its own light, and black is the pixel being off. A bright spot on an OLED is far rarer and usually means a damaged group of pixels or their driving circuit, which does not come from pressure in the same way and is less likely to be a single clean dot. The rest of this piece is mostly about the LCD case, because that is where white spots live.

Pressure spots, and why pressing makes them worse

Behind an LCD sit a light-guide plate and several diffuser films, and together they turn a strip of LEDs along one edge into an even glow. They are thin, soft and in contact with each other, so a dent or a trapped particle changes how light leaves the sheet at that exact point. The spot is usually round or slightly oval, has a soft edge, and is most obvious on white backgrounds and almost invisible on dark ones. It does not spread on its own, because nothing is leaking or growing; a second spot means a second impact. Pressing on it to test it is the one thing that reliably makes it larger, so resist the urge.

• Soft-edged, round, brightest on white: a pressure spot in the backlight.
• It stays exactly where it is and ignores every setting and restart.
• It does not grow by itself; pressing on it is what grows it.

Stuck pixels and dead pixels look different

A pixel fault is the size of a pixel — a pinprick, with a hard edge, in a single colour or pure white, and it is easiest to find by showing the screen a solid colour at a time. Plenty of free web pages and apps cycle through red, green, blue, black and white for exactly this purpose. A stuck pixel is one whose transistor is holding it on; some recover on their own over days, and some respond to a few minutes of a rapidly flashing pattern, which is harmless to try. A dead pixel is one that has lost its connection and stays black, and nothing software can do will bring it back. Either way a single pixel is very different from a backlight spot and is often covered by the maker's warranty, where pressure damage usually is not.

Moisture, and the spots that move

A patch that looks cloudy rather than sharp, changes shape when the phone warms up, or appeared after rain or a bathroom shelf is moisture that has found its way between the display layers. It is not a dent and it can clear by itself if the water is allowed to leave, which means a dry, warm room for several days with the phone switched off. Heat from a hair dryer or a radiator is the wrong idea; it pushes the water further in and can lift the adhesive holding the screen. If the patch grows or the touch layer starts misbehaving, the water has reached the electronics and the phone needs opening by a shop.

What a repair actually replaces

On nearly every current phone the glass, the touch layer and the display are bonded into one unit, so a fault in the backlight means the whole display assembly comes out and a new one goes in. The shop's quote is for that assembly plus the labour and, on water-resistant phones, a new seal. The part comes as either the maker's own or a third-party copy, and the difference is usually in brightness and colour rather than in whether it works. Whether the repair is sensible depends on the phone's age and what it would fetch, which is a judgement to make honestly before paying, because a spot that only shows on white backgrounds is something many people live with for years.

Living with it, and not getting another

A dark wallpaper, dark mode in the apps you use most and a slightly lower brightness make a pressure spot nearly disappear in daily use, because the spot is only light that the surroundings are not matching. Preventing the next one is a matter of what shares a pocket with the phone: keys, coins and the edge of a wallet are the usual culprits, and the back pocket is the usual place. A case with a raised lip around the screen keeps the glass off whatever it lands on, and a flip cover spreads a point of pressure across the whole front.

What to try, in order

1. Check whether the screen is an LCD or an OLED from the maker's specifications.
2. Show the screen solid white, then black, and note whether the spot is a soft blob or a hard pinprick.
3. Stop pressing on it; a pressure spot grows under pressure and nothing else.
4. If the patch is cloudy or appeared after water, leave the phone off in a dry room for several days.
5. Ask the maker's service centre whether a single pixel fault is covered, because it often is.
6. Get a quote for the display assembly, and weigh it against the phone's age and value.
7. Switch to a dark wallpaper and dark mode if you decide to live with it.

What to take from this

A white spot on an LCD phone screen is a dent or a speck in the backlight sheets, made by pressure, and it will not spread, move or respond to any setting. A pinprick is a pixel fault and may be covered by warranty; a cloudy patch is moisture and may clear on its own. The repair is the whole display unit, which is a decision about the phone's age as much as the spot. A dark wallpaper hides most of them.

Common questions

Will the white spot get bigger?

Not by itself. A pressure spot is physical damage that is already complete, and it stays the size it is unless something presses on that point again. If a spot is clearly growing over days, it is more likely moisture between the layers, which behaves differently and can clear.

Can a screen protector cause white spots?

A protector cannot damage the backlight, which sits behind the panel. What it can do is trap a speck of dust or a bubble against the glass that looks like a bright point in certain light; peel it back and the mark comes with it. A spot that stays when the protector is off is in the screen.

Is a white spot covered by the warranty?

Pressure damage almost never is, because it is classed as physical damage rather than a defect. A single stuck or dead pixel often is, depending on the maker's policy on how many are needed before the panel counts as faulty. Ask the service centre with the phone in hand rather than over the phone.