Brief Answer:
Follow up with a bit more information...

Detailed Answer:
Hello,

I have gone through your query and here is my advice.

Please let me know any specific reason to gain weight quickly?

OR

Do you have history of weight loss recently or having any other symptoms? Are you taking any medications currently?

If You had history of weight loss then we have to rule out underlying disease after necessary investigations.

So kindly follow up with detailed history.

Till then you can take proper balance diet, proper rest. Do Regular exercise.

Waiting for your reply.

Regards,
Dr. Shyam Kale

---