The doctor missed my vein during Sclerotherapy and now there is discoloration. What can I do?

You had the unfortunate circumstance of developing skin necrosis and ulceration from a unprecise injection.  This type of complication is rather rare.

 

In order to avoid this complication, the medication needs to be injected directly into the vein for it to work properly and to avoid damage to the skin.  Ultrasound guided injections can decrease this risk.  Also, the use of newer and safer sclerotherapy medications will decrese the risk of this type of reaction.  Also, the higher the concentration of medication used, the higher the risk of this as well . . . so the lowest concentration of medication possible is always better.

In terms of dealing with the bad cosmetic results, you would either need a surgical procedure to remove the scarred skin or a series of surface laser sessions to try to lighten the scar as much as possible . . . the best option would be determined by the extent and appearance of the damaged area.

I hope you found this information helpful.

Extravasation and skin ulceration are unfortunately known risks of sclerotherapy.  Hyperpigmenation due to inflammation is effectively treated with a bleaching cream like 4% Hydroquinone twice a day.  This takes about 4-6 months to be effective.  An in person evaluation would be required to determine if a laser treatment would be effective or appropriate.  Best wishes.