What are the key differences between CLaCS and conventional sclerotherapy for treating varicose veins and spider veins?
CLaCS (Cryo-Laser and Cryo-Sclerotherapy) and conventional sclerotherapy are both effective treatments for venous issues, aiming to eliminate unwanted veins. While both methods address similar concerns, CLaCS integrates laser energy with sclerosing agents and skin cooling. Conventional sclerotherapy primarily relies on injecting a sclerosant solution into the affected veins.
Medically Reviewed by Dra. Isabel Cristina

What is CLaCS, and how does it work to treat veins?
CLaCS, or Cryo-Laser and Cryo-Sclerotherapy, is an advanced technique that combines transdermal laser with injected sclerosing agents, all while the skin is simultaneously cooled. This integrated approach enhances the efficacy of the treatment, allowing for precise targeting of spider veins and reticular veins, minimizing discomfort and protecting the skin.
Frequently Asked Questions
Is CLaCS a painful procedure?
CLaCS is generally well-tolerated. The integrated cryo-cooling system significantly reduces discomfort during the laser application and sclerotherapy injection. Most patients describe the sensation as a mild stinging or prickling, which is transient. Dra. Isabel Cristina prioritizes patient comfort throughout the entire treatment process at SoulClin.
How many CLaCS sessions are typically needed?
The number of CLaCS sessions varies based on the extent and type of veins being treated. Some patients may achieve desired results in one or two sessions, while others with more widespread or resistant veins may require additional treatments. Dra. Isabel Cristina develops a personalized treatment plan during your consultation to outline the expected course.
How long do the results of sclerotherapy last?
The results of successful sclerotherapy are typically long-lasting, as the treated veins are permanently closed and reabsorbed. However, new spider veins or varicose veins can develop over time due to genetic predisposition, lifestyle factors, or hormonal changes. Regular follow-ups with Dra. Isabel Cristina help maintain optimal vascular health.
Can CLaCS and conventional sclerotherapy be combined?
Yes, in many cases, CLaCS and conventional sclerotherapy can be combined as part of a comprehensive treatment plan. Dra. Isabel Cristina may use different techniques to address various types and sizes of veins in the same patient, optimizing overall results. This tailored approach ensures the most effective strategy for your unique vascular needs.
Is CLaCS suitable for all skin types?
CLaCS is generally suitable for a wide range of skin types. The cryo-cooling component helps protect the skin, reducing the risk of hyperpigmentation or other side effects, especially in darker skin tones. Dra. Isabel Cristina will assess your skin type and medical history during the consultation to ensure CLaCS is a safe and effective option for you.
What are the contraindications for sclerotherapy?
Contraindications for sclerotherapy include pregnancy, breastfeeding, acute deep vein thrombosis, severe arterial disease, and known allergies to the sclerosing agent. Certain medical conditions may also preclude treatment. Dra. Isabel Cristina conducts a thorough medical evaluation to ensure patient safety and determine eligibility for the procedure.
When can I see results from CLaCS treatment?
Visible results from CLaCS treatment typically begin to appear within a few weeks as the treated veins gradually fade. The full effects may become apparent over several months as the body completely reabsorbs the closed vessels. Patience is key, and Dra. Isabel Cristina will discuss the expected timeline during your follow-up appointments.
Are there any specific post-treatment care instructions for CLaCS?
After CLaCS, it's recommended to avoid direct sun exposure on the treated areas and use sunscreen, as the skin can be more sensitive. Compression stockings may be advised for a period to aid healing. Light walking is encouraged, but strenuous exercise or hot baths should be avoided for a few days, following Dra. Isabel Cristina's specific guidance.
Can conventional sclerotherapy treat large varicose veins?
Yes, conventional sclerotherapy, particularly foam sclerotherapy, is highly effective for treating larger varicose veins. The foam formulation allows for better contact with the vein wall and displacement of blood, leading to more complete closure of the vessel. Dra. Isabel Cristina carefully selects the appropriate sclerosing agent and concentration for optimal results.
What role does lifestyle play in preventing new veins after treatment?
Maintaining a healthy lifestyle is crucial for preventing new spider or varicose veins. Regular exercise, maintaining a healthy weight, avoiding prolonged standing or sitting, and wearing compression stockings if advised, all contribute to better venous health. Dra. Isabel Cristina emphasizes prevention as part of her holistic approach to vascular care.


