hi.. welcome to healthcaremagic.. thanks for your query.. from your symptoms of weakness,increased appetite and numbness
and tingling sensation
in legs it seems that you are having peripheral neuropathy
due to a complication of diabetes mellitus
.. i advice you to get get lab tests done for blood sugar levels like fasting blood glucose level and random blood glucose level and consult a diabetician for furtheer management.. diabetes mellitus type 1 is common in younger age group..