I am a 19 yr old male. I believe I have a very bad body posture but I am not sure what kind of problem it is. Is it Kyphosis or Lordosis or any hip problem or neck problem or something else completely? Whenever I try to sit without support of my spine, it just doesn't feel right so I end up bending forward taking my elbows support on my thighs, or I just take any back support. I can't sit with a straight back for more than 30-45 mins, my lower back starts hurting. I also have a sedentary lifestyle, so whenever I am at home I'm laying on my bed with neck and back support of pillows Can someone please let me know what do I have, and what kind of exercises can I do to fix it? I have attached some images of the resting position of my body, and when I try to straighten my back.