My husband and I are on vacation in Greece. We have been in the sun quite a bit, swimming as well as walking. Today, we were on the beach for about 1 1/2 hours. We swam and he lay in the sun for about 45 minutes. We left, he felt really tired, heavy legs and needed to lie down-also a bit of chills. Two hours later, he had a fever of 103 (39.48 C) . We have gotten it down to 38 C (with vinegar sicks and cold compresses) and he says he now feels well. Do we need to follow up on this with a doctor? He is 55 years old and otherwise healthy, except for a disc in his neck which is pressing on a nerve. He is taking anti-inflammatories for this. Could this contribute? Thank you for advice