at the age of 20 it is quite unusual to feel weak. but what do u mean by feeling week. do u mean u r not able to do what u want or u have physical hindrances to do what u want or what exactly do u mean. i suppose u don't have any such problems such as wheezing or palpitations while walking or any such symptom. considering these factors the reason of the weakness can be psychological, no offence meant. depression can present as weakness; even repeated failures can also make u feel weak. so try to know what exactly u mean by weakness.
some also use the word weakness to mean that they weigh less. if this is what u think just stop worrying and u will put on the weight and gain the strength.
Answered by
anisha
, an ibibo Advisor,
at
7:16 PM on April 06, 2009