What is sclerotherapy for varicose veins?

Sclerotherapy is the most common method of treating spider veins (capillaries and small veins that become visible through the skin of the legs and thighs). It is an office procedure, performed without any anesthesia. A chemical is injected into the capillaries, injuring the wall.

The cells inside the capillary swell, blocking the blood flow. The body is quick to fix itself and will try to repair the blood vessels. Compression stockings flatten the inside of the capillaries (squashing them like a garden hose), allowing them to heal together, creating a permanent seal.

The blood can no longer flow through the capillaries. Sclerotherapy does not destroy capillaries. The remaining collapsed capillaries are unable to hold blood, however.

It is the red (or blue) blood inside them that is visible through the clear walls. By blocking the blood flow, the capillaries become invisible. A variety of chemicals can destroy capillaries.

The most common is a strong saltwater solution. This hypertonic saline has no chance of causing an allergic reaction, a major advantage. It does burn when injected, however.

Other chemicals cause less pain, but all have risks of allergic reactions. Since the solutions are injected straight into the blood vessels, a deadly type of allergy called an anaphylactic reaction can result. With this in mind, the decision to use the hypertonic saline solution is an easy one.

Sclerotherapy is the most common method of treating spider veins (capillaries and small veins that become visible through the skin of the legs and thighs). It is an office procedure, performed without any anesthesia. A chemical is injected into the capillaries, injuring the wall.

The cells inside the capillary swell, blocking the blood flow. The body is quick to fix itself and will try to repair the blood vessels. Compression stockings flatten the inside of the capillaries (squashing them like a garden hose), allowing them to heal together, creating a permanent seal.

The blood can no longer flow through the capillaries. Sclerotherapy does not destroy capillaries. The remaining collapsed capillaries are unable to hold blood, however.

It is the red (or blue) blood inside them that is visible through the clear walls. By blocking the blood flow, the capillaries become invisible. A variety of chemicals can destroy capillaries.

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