Can you use neosporin on the incision 4 days after thyroidectomy? incision has been glued shut to my knowledge.

Follow instructions: I recommend you follow the instructions you were given. Although it will probably not hurt you, if you were not told to put neosporin there, don't do it. After a routine clean surgery, this is not usually necessary.

Shouldn't hurt: The neosporin shouldn't be a problem for the recent scar as long as the proper amount is used and there is no irritation or allergic reaction to the cream or ointment.

Why do you: want to do that , you have a clean surgical wound , unlikely to get infected , usually no special wound care needed , speak to your surgeon , yes if you want .will not harm .

Wait: If top layer is 'glue,' it will dissolve with oil-based compounds, so hold off. If there is not increasing heat / redness (or pus) from the incision site, it does not need anything right away, anyhow--suggest waiting for post-op check. Surgeon will then likely recommend care to minimize scar formation.

FYI, re. Neosporin: Polysporin (bacitracin and polymyxin) or Bacitracin Zinc are often better tolerated than Neosporin. About 30% of the US population has developed allergy to neomycin which is one of the three antibiotics in Neosporin and it causes a skin reaction/contact dermatitis in those people. If you aren't one of those who reacts, the it's fine but if you develop a rash discontinue the ointment and see your MD. Follow your post op care