What causes yellowish smelly sperms?

Yellowish, smelly sperm can be caused by several factors, including an infection in the reproductive system, such as sexually transmitted infections (STIs) or prostatitis. Other potential causes include dehydration, which can concentrate the sperm, or the presence of urine in the semen, known as retrograde ejaculation. Dietary factors and certain medications may also contribute to changes in color and odor. If these symptoms persist, it's important to consult a healthcare professional for evaluation and treatment.