Permissible and Impermissible actions in Ihraam

Q: While in the state of ihraam, is it permissible for a male and female to wipe their face and head with a towel after performing wudhu or ghusl? If it is not permissible, will damm be compulsory? 

Q: Is it permissible for a person in ihraam to cover himself with a sheet or duvet when sleeping?

Q: ​I am planning to go for umrah but I wear a wig due to baldness. Can I continue wearing the wig after ihraam until the time that I commence the tawaaf for umrah?

Q:

1) Is it permissible to use a roll-on deodorant before entering into ihraam? 

2) Before entering into ihraam, is it permissible to apply an itr which leaves a colour stain on one’s ihraam?

Q: When in ihraam can one wear sunglasses and a watch?

Q: I have a few questions regarding hajj.

1. For example while in Ihram can one wipe his head and face with a small hand towel as it is going to be hot, especially in arafah?

2. While in Ihram can one use toothpaste to brush?

3. When you are in Ihram can one wear a dust mask as they are sensitive towards dust and fumes?

Q: In state of Ihraam I heard the shoelace area must be uncovered. What about when one sleeps covering the feet?

Q: Please advise me with regard to the use of toothpaste, mint sweets or any food which is meant for the use of a fragrant smell whilst in Ihraam.

Q: Is applying ointment for pain or other cause also prohibited after one had entered ihram, because normally all ointment has a scent whereas all scented things are prohibited in the state of ihram?

Q: I am going for umrah in April and I have a problem that after finishing the urination, I still dripping for a while so I would like to know that if I can wear an underwear to hold on?