Hello dear, The symptoms as mentioned in your post suggest that your husband might be having Dysosmia. It can be due to: 1. The olfactory system (deals with the sensation of smell) is appreciating an odour when it is not present in the environment. 2. The olfactory system has become more sensitive to an odour that doesn t bother other people. The causes can be attributed to: 1. Some medications like metronidazole 2. Exposure to certain chemical 3. Common cold or sinus infection 4. Depression, anxiety, etc. A proper examination of the nose & throat will be helpful in clinching the diagnosis. So, it will be better to consult an ENT specialist & get a proper physical examination done to rule out any organic lesion or any other cause in nose or throat. So that appropriate management steps could be taken. There is nothing to worry, he will be fine. Wishing a Good Health. Take care.