COVID-19 has a strong tendency to cause blood clots. The consequences of a clot depend on where it occurs, for example, clots in the heart cause heart attacks while those in the brain cause strokes.
Clots related to COVID-19 can occur anywhere, but they appear most commonly in the legs in the form of a deep vein thrombosis. This can spread to the lungs causing pulmonary embolism causing pain and difficulty breathing. Pulmonary embolism is a serious condition which is sometimes fatal.
Clinical assessment can give a good idea where a clot may have formed. Investigations in the form of scans (initially doppler scans) and blood tests are required to give a definite diagnosis.
