Body Mass Index (BMI). Body Mass Index (BMI) is measure of body fat based on height and weight that applies to both adult men and women. BMI does not differentiate between body fat and muscle mass. Therefore, body builders and people who have a lot of muscle bulk will have a high BMI but are not overweight or obese.
The bump: or hematoma as we call it, can last for 1-2 weeks. Sometimes it gets slightly worse before it gets better. If the child is acting normally, and not vomiting uncontrollably, she should be fine. If she starts doing those things, call your pediatrician.
A molluscum contagiosum infection commonly lasts for 12-18 months. Each lesion, or bump, has an approximate individual life span of 6-12 weeks until a crust develops on the bump and it goes away. But, while the infection remains active, new bumps or lesions may appear as the older bumps die off.