I'am 182 cm, but my weight is about 48 to 51 kg, is that normal? please how can i gain more kgs? i really feel shame sometimes. thank you !

Please send your age: in years & months & your gender. A BMI of < 18.5 is underweight for either gender. A medical evaluation for causes requires your child & adolescent growth charts, stage of puberty, health & family history & a 3-day diet record. Treatment depends on if your caloric intake is insufficient, if you're not absorbing calories or if you have a systemic illness that prevents your gaining weight.