Can the Aspiration of Seroma Done by a General Doctor?

Your post is emblematic of the problems and issues which can arise when you have surgery abroad. You may well have a seroma but should be examined in person by a board certified plastic surgeon, not a GP. I do not recommend leaving the seroma alone based on an email with your overseas doctor. Frequently serial drainage is required and the fluid expressed should be cultured to rule out infection. Removing drains prematurely because the patient is flying home is another issue here.

Anyone considering out of country surgery should be aware that managing complication which may be simple if your surgeon is local can be a logistical nightmare for the patient. 

In terms of who should aspirate this, I think that if your general physician is willing to do this consider yourself fortunate. Leaving it alone is not a good idea, and is more likely to result in a chronic problem for which only surgery will resolve.

I might add that most surgeon fees are comprehensive and include pre and post-op care. When health care consultants divide the professional fees they usually will say 70% is for the operation, 30% for the non-operative care, on average. That is on average, and since you are already having a complication, the amount of care you will need may be more than average. Don't be surprised if a plastic surgeon give you a quote for a third or more of his or her own fee for the type of surgery you had.

Best wishes, and thanks for the question.