If your wasp sting is still swollen after 48 hours, you may be wondering whether that's normal or a sign that something is wrong. In many cases, swelling can remain noticeable for several days, especially if you are experiencing a large local reaction. Swelling may even become more pronounced during the first 24 to 48 hours before it gradually improves.
However, worsening swelling isn't something to ignore. Increasing pain, warmth, redness, pus, red streaks, fever, or symptoms such as difficulty breathing or swelling of the face, lips, tongue, or throat can require medical attention.
Here's what to know about wasp sting swelling after 48 hours, how long it can last, what you can do to feel more comfortable, and when it's time to see a healthcare professional.