Three years ago I got dermal filler under my eyes for the first time. Since then, I've had one touch up. After the first procedure I would periodically experience swelling under my eyes, which would last for a couple of days. My doctor thought it might be a reaction to the filler she used so the second time she tried a different brand. The same thing occurred. Any idea what might cause intermittent swelling under my eyes? The swelling does not occur anywhere else I have filler.Dehydration maybe?