 [ Symptoms ] variose veins on my left testicle  hi im 17 years old and i have large varicose looking veins on my left testicle they do not cause me any pain or bother or interfere with things in any way they are just ugly looking i have had them for as long as i can remember at least since i hit puberty are they a problem and will they cause any health problems in the future [ Disease ] you are most likely talking about varicoceles this type of varicose veins are most common on the left side and in most cases will not cause any issues however very large varicoceles have the potential to decrease your fertility by lowering your sperm count on that side only about 1 in 12 adolescent males have these things and they rarely require any medical intervention to read more about them just put adolescent varicoceles in your google search engine