Health experts say the yellowish substance many people notice in their eyes after waking up is usually harmless. However, in some cases, it may point to an underlying eye problem that needs medical attention.
Newsonspot reports that as its commonly called “eye sleep,” this discharge is a mixture of mucus, tears, dead skin cells, and debris that build up overnight. Because blinking stops during sleep – and blinking helps clean the eyes – these substances can collect at the corners of the eyes. When the discharge is light yellow, minimal, and easy to wipe away, it is generally normal and not a cause for concern.
That said, doctors warn that persistent or excessive yellow discharge can signal irritation or infection. Conditions such as dry eye syndrome may cause thicker discharge due to poor tear quality. Allergic reactions can also trigger increased mucus production, often along with itching or mild redness.
More serious causes include bacterial conjunctivitis (commonly known as pink eye), which usually produces thick yellow or green discharge and may cause the eyelids to stick together on waking. Another condition, blepharitis – an inflammation of the eyelids – can lead to yellowish crusting along the lash line, often with redness and discomfort.
Experts advise seeking medical care if eye discharge becomes continuous, thick, or discolored, or if it comes with symptoms such as eye pain, swelling, redness, sensitivity to light, or blurred vision. These signs may indicate an infection that requires prompt treatment to prevent complications.
To reduce the risk of eye problems, health professionals recommend maintaining good eye hygiene. This includes gently cleaning the eyes with warm water, avoiding eye rubbing, and practicing proper hand hygiene. Contact lens users should stop wearing lenses if symptoms appear and wait until a healthcare professional gives clearance.
While occasional yellow eye discharge is usually part of the body’s natural defense system, experts stress the importance of monitoring changes in color, amount, and associated symptoms to ensure early diagnosis and effective care.
