How Much Time Should Be Left Between 1st and 2nd Treatment of Sclerotherapy?

The timing between sclerotherapy sessions in the same areas varies among treating vein specialists. In my practice, the time between sessions is at least 3 months, provided that the entire area was completely treated in the first session. This allows enough time for the bruising to resolve and, more importantly, for the treated veins to thrombo-obliterate and heal. 

I recommend 6 weeks between sclerotherapy treatments. This allows enough time for the bruising to resolve and, more importantly, for the treated veins to dissolve. After 6 weeks, whatever veins are left will then need to be retreated. Is sclerotherapy is done at too frequent intervals then veins that have already been treated will be retreated unnecessarily. Somewhere between 4 to 6 weeks is an adequate interval.