Completely out of the blue yesterday I had two serious episodes of diarrhoea within 30 minutes, followed by feeling very tired and yawning constantly.
This passed in a couple of hours and I was then fine, but I woke up this morning with several large, hard, itchy, red lumps on my upper arms and these have increased throughout the day and spread to my back and shoulders.
The itching is intense and it has not responded to oral anti-histamine.
Is this an allergic reaction to something. I've never had anything like this before.
What do I do? Is it likely to happen again and get more serious?