A visit to the mother in law – a hidden cause for urticaria.

The article presents a case report that illustrates that a pseudo-allergic urticaria reaction to non-steroidal, anti-inflammatory drugs can be due to hidden and involuntary intake of the drugs. The case reported was a 30-year-old male patients who had been suffering from repeated episodes of urticaria which had developed because of the acetylsalicylic acid used as a preservative in some of the house-canned fruits, berries and vegetables he eat on occasions he visited his mother-in-law.