Performing Hajj on behalf of a person who can not put up with crowd

Q: My maternal aunt undergoes treatment for a psychological disease. She cannot put up with crowd, and gets disturbed and becomes uncontrollable. Once, I accompanied her to perform `Umrah (lesser pilgrimage) in 1418 A.H, but she exhausted us so much by her loud voice and pain. The issue we face now is that she did not perform Hajj and I do not know what I should do as her condition does not help her perform it. Please, Your Eminence, guide us, may Allah safeguard you. Should I authorize someone to perform Hajj on her behalf or accompany her in Hajj? What else can I do?

A: You should wait, as she may recover and perform Hajj herself, but if she does not recover from her disease and you become hopeless with regard to her condition, then she should authorize a person to perform the obligatory Hajj on her behalf. (Part No. 10; Page No. 60) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.