Whether anxious feelings are present in the short or the long-term, they will often be associated with the same sorts of responses, such as fatigue, dizziness or disorientation, lack of breath and a racing heart rate. However, when this state is sustained for a long time, there can be further problems that will start to develop. Scientists have yet to produce conclusive results in their studies in this field, but a long-term feeling of worry and anxious behaviour may lead to a worsening in immune response. Another thing that is indicative of longer-term states of nervous-anxiety includes susceptibility to migraines and even the increased risk of heart disease. Some studies also suggest that there may be a link to certain gastrointestinal problems. As previously mentioned, feeling anxious is a normal part of life, and it will often go away without causing further worries. Only when it is present for prolonged periods might it lead to these other outcomes, which is why professional medical help should be sought.