Do you have redness,itching,blisters on feet?
Any other medical history?
Since how long have you been suffering from?
Are you taking any medications?
Hello,Thanks for providing more information.
I understand your concern and I will do everything I can do to help you.
Sunburn can definitely cause swelling wherever it occurs on the body.
I realize that this can be quite painful and uncomfortable.
The sun sure can brutal in the summer months.
One of the first things you can do help reduce swelling is to emerge your feet in a cool bucket of water or place an ice pack on your feet to help reduce swelling.
The swelling is most likely caused from the extensive walking as well.
Stay off your feet and try to rest.
Continue to stay well hydrated.
Try OTC cream with hydrocortisone on it as well as a topical anesthetic like Pramoxine(AmLactin AP).
You can continue Motrin and Aloe vera gel for next few days as well.
If your symptoms get worse over the time then consult your nearby doctor for further evaluation and management.
I hope this helps.
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Most likely it is available at your nearby drug store or pharmacy over the counter without prescription.
In some places,it's available only with prescription.
So you should firstly check it over the counter as some brand like Sarna Sensitive lotion,AmLactin AP.
Also take OTC Claritin which also reduce swelling and redness.