You can consult with the doctor who has been treating your hypothyroidism with eltroxin ,as hypothyroidism is also one of the reason for leg swelling due to water retention.

I really understand your concern but i want to know few more details about your symptoms.kindly consult on practo You need to consult general physician 

Please consult a General Physician in your area. A physical examination is required before any further referal can be advised.

I understood your concern  and noted the problem as well .I need to ask few more details to make a diagnosis and start treatment and advice which suits you. Pl consult me on Practo , so that I can help you better.book a time slot as per your convenience for consultation.

It can be due to many reasons.. Kindly do a complete cardiac chechk up. Or u can consult in practo

Kindly consult a physician at your locality or else online on practo

Kindly consult

Can help you with the next course of action and treatment plan. Would like to discuss in details and provide apt solution. Kindly consult.

Can help you, kindly provide me detailed history for proper diagnosis and further management

Kindly discuss

History is incomplete With this information we can't come to conclusions

According to your sign and symptom you are suffering from some swelling in the leg. As you know that best treatment depend on the correct diagnosis and correct diagnosis depend on the complete history of the patient so please take consultation from a doctor and give complete history of the patient so that correct diagnosis will be make and then best treatment will be start