There is no objection in carrying anything which is najis during tawaaf.

There is no objection in carrying anything which is najis during tawaaf. Rule 295: There is no objection about blood from ulcers or wounds oozing in the course of a tawaaf if it is difficult to restrain it. Nor is it obligatory to remove the blood from the cloth or body in the course of the tawaaf. For a pilgrim to have with him unclean things in the course of a tawaaf does not invalidate the tawaaf nor items which would invalidate the prayers (salaat) if worn in them.

Rule 296: If the pilgrim is unaware of any uncleanliness (najasah) on his body or clothes and becomes aware of it only after completion of the tawaaf, it is valid and there is no need to repeat it. Similarly even the prayers (salaat) after the tawaaf will be valid if he was unaware of…