finds her blood thickness to vary a lot at different times. Depending on what time of the day it is, how hydrated she is, how much activity she's had that day, if she's rattling or not, the list goes on...and of course, the thicker the blood, the quicker the pin blocks.
Eating a good diet, sleeping well, drinking a lot of water, all the general tools of a healthy lifestyle should help keep your blood nice and thin.
Obviously, if you start to have real concerns about your blood being too thick, you should make an appointment to see a doctor. Overly thick blood increases the risk of deep vein thrombosis, which is a real risk for injecting drug
users. Admittedly, more so for people who use their groin, but it's still something worth keeping an eye on.
A daily dose of low-dose aspirin (usually 75mg) is often used by adults at greater risk of blood-clotting related problems, such as heart attacks, thromboses and strokes, because of its anti-coagulant properties. Although aspirin is a relatively low risk medicine, as with all medication, you shouldn't start taking it without first consulting your doctor.
This thread here has some more info on the subject of blood clotting in syringes: