مناسك حج - مكارم شيرازى، ناصر - الصفحة ٧٣ - Acts that are Haraam in the State of Ihram
Article ١٠٠- Tying a handkerchief around the head because of headache has no problem, also drying the head with handkerchief or towel is permitted on the condition that the pilgrim does not cover the head with that.
Article ١٠١- Whenever Muhrim forgot the issue and covered the head, it is Mustahab to say Labbayk again but it is not obligatory.
Article ١٠٢- It is an obligatory precaution not to cover the head with" mud" or" henna" and like them or putting something like basket on the head.
Article ١٠٣- Muhrim is not permitted to sink his/ her head into the water, even if the rest of the body is out of water or not, but pouring water on the head for Ghusl or other purposes and taking the shower are permitted; but Muhrim should not sink his head into the water in the bathtub.
Article ١٠٤- The atonement of covering the head is one sheep for men as obligatory precaution, but in case of ignorance or forgetfulness has no atonement.