Are swollen feet an allergic reaction?

THey can be, but then can be indicators of quite a few other things, including: * Hyperhydration (usually accompanied by an increase in sodium or potassium consumption). I.E. Water retention. * Over-use -- if you're not used to carrying a heavy load over a long distance and just did so, the swelling may be a reaction similar to a bruise. * If you're female, this may be related to your menstrual cycle. * Swelling ankles and pitting edema (if you press the ankle with your fingernail, and the fingernail mark remains over 20-30 seconds), this can also be an indicator of conjestive heart failure. If you have a history of CHF, call your cardiologist about this. * If the feet have been exposed to an antigen, this could be a mild allergeric reaction, but most allergic reactions include more symptoms -- especially itching and hives -- than just swelling. Were your feet exposed to something new? New socks that you didn't maunder before wearing? New foot powder. This can be exacerbated if you live in a low altitude area and travel to a higher altitude. For instance. my feet always swell on airplanes (which pressurize as if I were 7,000ft above sea level).