You are having hypothyroidism it do cause swelling in body and weight gain .you continue with medicines as advised. Do have
thyroid function test regularly and adjust the doses accordingly of thyroxin tablet . Swelling on knee and ankle is also occurs due to hypothyroid if you are not having pain then don’t worry otherwise meet an orthopaedic surgeon if you are having pain in joints.
Next Steps
TFT , consultantstion with orthopaedic surgeon
Health Tips
If pain in joints