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What Are the Common Causes of Watery Semen?

By Christina Edwards
Updated Mar 03, 2024
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In some instances, watery semen may be a normal occurrence. For instance, pre-ejaculate is often clear and watery. Some studies indicate that a man's diet may also effect the consistency of his semen, and frequent ejaculation can also result in watery semen. Men with low sperm counts may also have semen that is thinner than normal.

Semen consists of a few components. Sperm makes up only a small percentage of semen, and it is produced in the testicles. Roughly half of semen is made up of a fluid produced in the seminal vesicles. This fluid is very high in fructose, which provides energy for the sperm to swim. The prostate and bulbourethral glands also produce fluids that make up the rest of the sperm.

A substance known as pre-ejaculate is produced by the bulbourethral glands, or Cowper's glands prior to ejaculation. This fluid is used for lubrication during sexual intercourse and ejaculation, and it can often be seen on the tip of a man's penis when he is sexually aroused. Although this substance alone does not contain sperm and is not actually semen, it can resemble watery semen.

Diet may also affect, among other things, the consistency of semen. A man may have watery semen if he does not get the proper amount of certain essential nutrients. Protein, for instance, is believed to help make semen thicker. A man who does not get enough protein in his diet may have watery semen.

The consistency of semen is also often affected by how often a man ejaculates. Generally, sperm takes a few months to mature in the testicles. If a man ejaculates several times each day, such as with frequent masturbation or intercourse, his testicles will usually not be able to produce enough sperm to keep up. This will often result in less sperm present in the semen. Instead of the semen being thick and white, the lack of sperm could cause watery semen.

A low sperm count could also possibly cause watery semen in some men, due to the same reason: not enough sperm in the semen. Several factors can affect a man's sperm count. If the testicles are kept at too high of a temperature, for instance, sperm might not develop properly. Clothing that is too tight can sometimes cause a rise in the temperature of a man's testicles, especially if he exercises with this clothing on.

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Discussion Comments

By anon958355 — On Jun 26, 2014

I am still taking my medication, and each day I masturbate which produces white watery sperm. Please how can I stop masturbating?

By anon951064 — On May 13, 2014

I took hair loss medication almost two years ago. My ejaculate went from being thick, extremely viscous and white to extremely watery and with a much lower volume. It has since improved marginally (i.e sometimes a bit cloudy), but is still 90 percent watery, whereas before it was not watery at all. I am becoming worried about what it has done to my sperm count and fertility. I would be less worried if it was always like this, but since it only started with the drug, I don't know if it's serious or not.

By anon930178 — On Feb 04, 2014

I only ejaculate clear white liquid. It's not pre-ejaculate. How big of a problem is this?

By stoneMason — On May 23, 2013

@literally45-- Some medications do affect semen texture and quantity.

For a while, I was taking a hair loss medication which caused my semen to become watery. I was afraid that this had become permanent but thankfully, everything went back to normal after I quit the medication.

Some medications also cause an increase in libido which can result in more frequent sexual activity and ejaculation. And it's a known fact that frequent ejaculation results in watery and less semen.

By literally45 — On May 22, 2013

Can medications cause watery semen?

By ZipLine — On May 21, 2013

@anon335250-- That sounds like pre-ejaculate. Like the article said, the penis releases this fluid when aroused, before or during intercourse. It's absolutely normal.

If you look at it closely, you will see that it's much more watery than semen and it's clear in color.

Both women and men release fluid when aroused. The purpose is to protect the genitals during intercourse.

By anon335250 — On May 19, 2013

What does it mean if I start having clear semen seep out of my penis before intercourse?

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