Underweight or skinny ? You should know the causes


Are you underweight ? If so, then why? 


Being underweight can represent as many health concerns to an individual as being overweight can . If you are skinny or underweight along with that you are feeling fit or energetic that means you are healthy and It can be your metabolism and structure .

But, If a person is underweight, and also getting sick frequently , their body may not be getting the nutrients it needs to build healthy bones, skin, and hair. If the healthy weight calculator has told you that you may be underweight .


                     BMI =  weight (kg) / [height (m)]2

A person can calculate their BMI by visiting the CDC’s Adult BMI Calculator. Ranges for BMI include:

Underweight: less than 18.5

Normal/healthy weight: 18.5 to 24.9

Overweight: 25.0 to 29.9

Obese: 30 or higher

Here are some reasons for being underweight:

Iron deficiency

If there is iron deficiency, that means the person doesn’t have appetite to eat , if he / she doesn’t eat then he /she cannot have muscles.


Scientists say that some people have a naturally low BMI due to physical characteristics that run in their family.

Too much physical activities

Increased physical activity without an increase in food intake may result into underweight . Athletes or people who engage in high levels of physical activity, such as runners, may burn significant amounts of calories that result in low body weight.

Lack of intake calories

Irregular habits of eating and poor selection of foods leading to inadequate nutrient and calorie intake which in result makes you underweight.

Eating disorders

If you feel anxious or worried when you think about food and feel that stress or low self esteems are affecting the way you eat . So ,you may have an eating disorder

Medical disorders

Being underweight is associated with certain medical conditions, including type 1 diabetes, hyperthyroidism, cancer, and tuberculosis. People with gastrointestinal or liver problems may be unable to absorb nutrients adequately.

Pschological & Neurological disorder

Psychological factors like in patients with mental illness or anorexia nervosa who refuse to eat adequately. Poor mental health can affect a person’s ability to eat, including depressionanxiety, obsessive-compulsive disorder (OCD), and eating disorders, such as anorexia and bulimia. Each of these conditions can affect a person’s body image and appetite.

 When to see a doctor?

 If you are eating too much , and still you are not gaining weight. So you have to get  checked for two things:

Hyper thyroid

 The person might have been  hyper thyroid , where metabolism is very high and     you looses lots of weight .

Vitamin B deficiency

 In which the absorption of nutrition doesn’t take place, that results into getting     underweight.

 And also, if you’re experiencing  any effects of ill health due to being unable to  gain weight, such as missed periods or irregular periods should also see a doctor .  Women who are underweight may not have regular periods, they may find   menstruation stops, or an adolescent’s first period may be delayed or absent.  Irregular or absent menstruation can cause infertility.

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