Anxious feelings are not felt in a vacuum without a range of other emotions that go with them. Worries over a loved-one will often be mixed in with emotions such as affection, empathy and protectiveness, for example. Moreover, when you are talking about clinical anxiety, there are often associated medical conditions which will also be at play. For example, it has long been known that anxiety-depression is a state that many people who suffer from clinical depression will feel. That said, being anxious does not mean that you will necessarily be depressed. They are associated conditions but not the same thing. Medical professionals have also noted some correlation between anxious emotive states and other conditions, such as COPD and asthma, which negatively impact breathing. In certain cases, conditions that lead to sexual dysfunction will often be accompanied by excessive worrying, too. Furthermore, some conditions associated with brain degeneration - such as Parkinson's disease or geriatric dementia, for example – are also sometimes found to be linked to high levels of nervousness.