Is it permissible to perform tayammum for missed prayers, night prayers (Qiyam al-Layl), supererogatory prayers (Nawafil), and reading the Qur’an, and to perform wudu only for obligatory prayers, due to a chronic illness that causes motor disability and loss of balance, as well as skin problems from using water, and inability to control wudu due to the emission of wind?

If a sick person fears harm from using water, or is harmed by moving to perform ablution and has no helper, then tayammum is permissible for him; because that which is impossible to obtain is like that which is lost. Tayammum is permissible for all acts for which ritual purity with water is permitted, such as obligatory or supererogatory prayers, touching a Mushaf, or reciting Qur'an.