Hi. welcome to HCM
According to your Xray report it looks like the right diagnosis, as age is 23 years only.
In this age loss of normal curvature is not degerative process, so dont worry.
Due to heavy exercise or weight lifting paraspinal muscles get hurt and spasm. Just take muscle relaxant
tablets like MYOSPAZ or consult your physician and take rest.
If she will have chronic pain
for long duration then we can think for investigation loke MRI