How to Tell the Difference and Why It Matters for Treatment
Red or purple marks on the skin are often broadly referred to as “thread veins” by patients, but in clinical practice, not all visible vessels are the same. One of the most common areas of confusion we see at our London and Kent clinics is the difference between broken capillaries and thread veins.

Although they can look similar to the untrained eye, they behave differently in the skin and may require different treatment approaches. Understanding the distinction is important for achieving the best possible results.
What Are Broken Capillaries?
Broken capillaries are tiny blood vessels that have become permanently dilated or damaged near the surface of the skin. They are typically very fine, appearing as:
- Small red lines
- Localised clusters of redness
- Tiny web-like marks
- Spots of persistent flushing
They are most commonly found on:
- The nose
- Cheeks
- Around the eyes
- Chin area
Broken capillaries are often associated with skin sensitivity, environmental damage, or repeated trauma to the skin.
What Are Thread Veins?
Thread veins, also known as spider veins or telangiectasia, are slightly larger visible superficial veins. They tend to be more structured and may appear:
- Red, purple, or blue
- Slightly raised or more defined
- Linear or branching in pattern

They are commonly seen on:
- Cheeks
- Nose
- Legs (especially thighs and calves)
While both conditions involve superficial blood vessels, thread veins are typically more established and visible than broken capillaries.
Why the Difference Matters
Correct diagnosis is essential because treatment effectiveness depends on vessel type.
For example:
- Very fine broken capillaries respond best to precise thermocoagulation techniques
- Larger thread veins may require different energy settings or multiple sessions
- Misidentification can lead to under-treatment or unnecessary repeat procedures
At Thread Vein Clinic, we always begin with a detailed vascular assessment before recommending treatment.
Common Causes of Both Conditions
Although they differ structurally, broken capillaries and thread veins share several common triggers:
- Sun exposure and UV damage
- Genetic predisposition
- Hormonal changes (including pregnancy)
- Skin trauma or aggressive exfoliation
- Temperature extremes (hot and cold fluctuations)
- Alcohol and lifestyle factors
Over time, repeated exposure to these triggers can lead to progressive vessel visibility.
Facial Areas Most Commonly Affected
In both London and Kent patients, we most frequently see concerns in the following areas:
Nose
Highly vascular area with thin skin, making vessels very visible.
Cheeks
Often affected by both diffuse redness and discrete thread veins.
Chin
Less common but often associated with hormonal changes.
Treatment Approach at Thread Vein Clinic
We use advanced thermocoagulation technology, including ThermaVein, to target fine superficial vessels with high precision.
This treatment is particularly effective because it works directly within the vessel rather than relying on light absorption or pigment targeting.
The result is:
- Immediate vessel closure
- Minimal damage to surrounding tissue
- High precision for facial areas
- Effective treatment of fine red vessels
What Happens if You Treat the Wrong Type of Vessel?
One of the key reasons patients seek specialist care is that incorrect treatment selection can lead to suboptimal results.
For example:
- Treating diffuse redness as isolated thread veins may not be effective
- Treating broken capillaries with inappropriate energy settings may cause irritation
- Under-treating more established veins can result in incomplete clearance
This is why professional assessment is critical before starting treatment.
Why Patients in London & Kent Seek Specialist Diagnosis
Many patients initially assume they have “just thread veins”, but a significant proportion actually present with a combination of:
- Broken capillaries
- Early thread veins
- Background redness
This is especially common in facial areas exposed to environmental stressors such as pollution, UV exposure, and temperature variation — all relevant factors in both London city environments and surrounding Kent areas.
When to Seek Treatment
You may benefit from assessment if you notice:
- Persistent red lines on the face
- Small visible vessels that do not fade
- Increasing visibility over time
- Cosmetic concern in photographs or natural light
Early treatment is often simpler and more effective than waiting for progression.
Thread Vein Treatment in London & Kent
Our clinics provide specialist-led assessment and treatment for facial vascular concerns across:
You can read more about our clinics here:
Tunbridge Wells, Kent
Harley Street, London
Although broken capillaries and thread veins are often grouped together, they are not identical conditions. Understanding the difference is essential for selecting the right treatment approach and achieving optimal results.
With accurate diagnosis and precise treatment using ThermaVein, most patients can achieve a significant improvement in skin clarity with minimal downtime.