The sperm, which has the great mission of reproduction, is the most amazing and delicate cell in the male body. The more delicate and wonderful things are, the more fragile they tend to be. This is also the case with sperm, and there are many factors that affect sperm, and temperature is one of them. The sperm is coffee colored and may be caused by blood sperm, this semen is usually light red or coffee colored, this is a sign of blood, normal semen does not contain blood components. In this case, the possibility of self-healing is very small. The main reason for the appearance of hematosperm is inflammatory infections of the reproductive system, such as prostatitis, vesiculitis or seminal vesicle stones, etc. Only after chronic vesiculitis gets better, the semen color can slowly recover, ranging from 3-6 months. It may also be caused by tumors and vascular abnormalities, especially in older men, who have not been regularly screened for prostate tumors, should be alert to the possibility of hematospermia caused by prostate cancer infiltrating the seminal vesicles, and go to the hospital for relevant examinations in a timely manner so that the doctor can provide reasonable treatment. It may also be caused by high blood pressure, genital tract injury, etc. This condition generally requires controlling the blood pressure to a normal range.