A common international standard to measure the degree of obesity and health is the body mass index as a reference.
That is body mass index = weight kg/ height m? The body mass index is normal at 18.5 ~ 23.9.
Your body mass index =5 1.5/ 1.73? ≈ 17.2, so your condition is thin, which naturally does not belong to the health range.
It is suggested that you can properly carry out some projects to gain muscle and weight.