Weiss et al (1999) studied the effect of the duration of compression following micro-sclerotherapy using Class 1 stockings.

They concluded that wearing a Class 1 stocking for 2-3 weeks gave significantly better results than no compression, particularly if the results were followed up at 24 weeks.

Their conclusion was that compression significantly reduced the incidence of pigmentation and they advise patients to wear compression for 2-3 weeks.

They also noted that 7 days compression was better than no compression.