Now the detective work starts. If you have an obvious suspect, you may not need to read the rest of this section. If you feel ill after you eat a particular food that you eat only seldom – say on holiday or if you go out to eat – then you could go straight for that. Do you feel ill during or after visiting friends or family? If so, it could be something in their house – their pet, their gas fire, their carpet, their soap powder.
Do you feel unwell only if you wear certain clothes, or if you dress up to go out? If so, it could be the fibres or the clothes, or it could be toiletries or cosmetics that you do not usually wear. Do you get symptoms after doing DIY, doing a particular hobby, after specific lessons or activities at school? Think hard about when and where your symptoms occur.
You can also keep a symptoms diary. For a week or longer, note down whenever you feel particularly bad. Look and see if there’s any pattern. Do it for a few weeks, or longer if you need to.
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