Most people don’t know the meaning of the half moon at the base of the nails

The Lunula and Circulation

Because the nail matrix is sensitive to blood flow, the lunula can be influenced by circulation.

Cold hands, frequent vasoconstriction, or stress may reduce its visibility temporarily.

This is one reason why:

• Lunulas may appear more prominent in warm conditions
• They may fade in cold weather

Stress, Fatigue, and the Lunula

Chronic stress affects:

• Blood flow
• Hormone balance
• Cell regeneration

Over time, this may slow nail growth and subtly affect the lunula.

Many people notice changes during:

• Prolonged stress
• Sleep deprivation
• Burnout

Once balance returns, the lunula often becomes more visible again.