It is permissible for the pilgrim in Ihram to use creams on the thighs to prevent chafing because the purpose here is using it as a remedy.

If the pilgrim is a female, it is permissible for her to cover her head in the state of Ihram. But if the pilgrim is a man, it is not permissible for him to cover his head when he is sleeping or when he is awake.

1. It is not permissible for the pilgrim in Ihram to wear what covers the entire foot, plus the ankles such as the Khuff, boots that cover the ankle, army boots, and so on. 2. There is nothing wrong with wearing the sandal which is the same size as the sole of the foot, but leaves the top of the feet, the heels and the ankles uncovered. 3. If the shoe does not cover the ankles, but it covers the rest of the foot, such as the toes, the top of the foot and the heel, then there is a difference of scholarly opinion as to whether it may be worn in Ihram, because of the difference of opinion as to whether it resembles the Khuff or sandal.

There is nothing wrong with covering the head with something that does not touch or stay above it such as an umbrella, tent, car roof etc. while in the state of Ihram.

Whoever needs to wear diapers in ihram because of sickness and the like, it is permissible for him to wear them, but he must pay the fidyah which is sacrificing a sheep, or feeding six poor persons, or fasting for three days.

Masturbation is haram during Hajj and otherwise, but during ihram it is worse and more serious, although it does not mean that hajj is rendered invalid according to the majority of jurists, with the exception of the Malikis. You should offer a compensatory sacrifice for that which is a camel according to the Hanbalis.