Today I have discovered that it is haram to pray on chair, and now when I want to see if I have any problem with bowing as in masjid, then I started to feel humiliation and shame again, is this normal to have this feeling? Because, usually I do praying on chair by standing up and then bow down by putting your head down on chair because I have done backbone surgery. So my question is, my prayers have been accepted even if I did not know but still prayed? And If I have done backbone surgery and still I’m in recovery, then I can pray on chair if I want to? What kind of illness does not allow you to make ruku or prostration but to pray on chair? Can you give me few examples? Because, I don’t understand, I have found that if you cannot because if illness and so on then you can sit and pray. Can you give few examples what kind of illness does not allow you do pray without a chair? And I can do prayers in private if I want to? Because, I feel comfortable when I pray alone in room and I feel disturbed when someone enters my room while praying. Because, I want to pray to God in private.
Instead of using chair for prayer you may sit on the floor.