Although the army of Yezid did not kill him because he was sick, they treated him very badly by putting him in heavy chains.
As a prisoner, he was made to travel on the open back of a camel in burning sunshine from Kerbala to Kufa and then from Kufa to Sham (Damascus) - a distance of about 750 kilometres. Sometimes, he would be made to walk on the burning sands of the desert.
This was not all. Women and children belonging to the family ofthe Prophet, Hazrat Muhammad (S.A.W.W), too, were handcuffed and treated like they were slaves.
The daughters of Imam Ali (A.S) and Hazrat Fatima (A.S) were treated worse than criminals, their Hijab having been taken away from them.
A caller would accompany them introducing them to the passersby as “Those who had disobeyed the Muslim ruler, Yezid”.
They were then presented as prisoners, first to Ibn Ziyad in Kufa and then to Yezid in Damascus.
Source:
A Brief Biography of Ali Ibn Husain (a.s)
By: Muhammad Reza Dungersi. PH.D
[Vol. 1, P. 8].