Can You Wear Surgical Truss before Ihram?
Question

What is the ruling on using a surgical truss during Tawaf? Some people cannot move or walk without it, and this truss or belt is stitched. Is it permissible to use this truss during Hajj?
Praise be to Allah.“Yes, it is permissible to use a truss during Hajj and also during `Umrah, even if it is stitched. It should be noted that when the scholars (may Allah have mercy on them) said it is prohibited for a man to wear “stitched” garments (in Ihram), what they meant was shirts or chemises, pants and the like. Hence we have to understand the words of the scholars as they meant them. 
Moreover, this phrase, “stitched garments  ” is not narrated from the Prophet (blessings and peace of Allah be upon him). It was said that the first one to use this phrase was one of the jurists of the Tabi`un, Ibrahim An-Nakha ‘i (may Allah have mercy on him). The Prophet (blessings and peace of Allah be upon him) did not tell the Ummah not to wear form-fitting garments; rather he was asked: What should the Muhrim wear? And he said: “He should not wear a chemise, pants, a head covering, a burnoose or Khuff (any footwear that reach above the ankle).” He did not use the word “stitched” at all. So we have to understand the texts as the speaker intended.”
For more details about Ihram, please see the following answers: 11356 , 33738 , 109341 and 69934 .         
And Allah knows best.