The cause of cluster headaches is unknown. They tend to run in families, which suggest genetics may play a role. They may be triggered by changes in sleep pattern and by certain medications. Symptoms of a cluster headache include unilateral pain in the face and head that is sharp in quality and very short in duration.
The normal temperature of human urine ranges from 94Â°F to 96Â°F (about 35 Â°C). The temperature of drug test sample must be measured during first 4 minutes after it was received, as it changes depending on ambient temperature. Acceptable range is from 90 Â°F to 100 Â°F (32 Â°C - 38 Â°C) , any sample with a temperature out of this range will immediately fall under suspicion.
Different fluids in the human body generally have a delicate range of acid-alkaline balance they maintain for optimal functioning. Human blood has a normal pH of about 7.41. The pH of urine has a wider range. Normal ranges for urine pH are from 4.5 to 8.