The disc bulges at L3-L4, L4-L5 and L4-L5 levels represents a backward movement of your disc (commonly referred to as slip disc). This disc may compress the nerves within your spinal canal
and cause pain (usually shooting pain radiating along your thigh and leg). However, in your case the herniation is mild and does not appear to be a cause of much worry. However, if you do have shooting pain / tingling or numbness of your feet or toes then you may need to consult an Orthopaedic Surgeon
to treat the disc herniation.
The loss of lumbar lordosis
is usually due to spasm of your back muscles and is easily relieved with antispasmodics and anti-inflammatory medication. Sometimes, the position in which you lie down for scan can also cause loss of lumbar lordosis.
(dessication) of disc is just a loss of water content in your disc. It is usually age-related and mostly of no significance as it does not cause pain by itself.
Overall, your scan isn't something to be too worried about if you do not have classic symptoms of nerve root compression
(eg: tingling or shooting pain along the thigh, weakness of one leg, etc).