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Hypertrichosis can be congenital or acquired. The acquired condition is usually caused by an illness or drugs. Illnesses that might cause this condition are hypothyroidism, malnutrition, AIDS, dermatomyositis (a connective tissue disease), and porphyria cutanea tarda (a condition involving enzymes).
The most common cause of portal hypertension is cirrhosis of the liver. Cirrhosis results from scarring of liver injuries caused by hepatitis, alcohol abuse or other sources of damage. In cirrhosis, scar tissue blocks the flow of blood through the liver. Other causes of portal hypertension include blood clots in the portal vein, blockages of the veins that carry the blood from the liver to the heart, and a parasitic infection called schistosomiasis. Sometimes the cause is unknown.