Dear chillax,

When people get tense and experience "performance anxiety," there are physical changes in their bodies — including the tightening of blood vessels.

Yes, this is normal. When a guy is sexually aroused, the spongy tissue in his penis relaxes and blood flows into it at a faster rate than it flows out — vasocongestion. This causes an erection — the penis gets larger and harder. When people get tense and experience "performance anxiety," there are physical changes in their bodies — including the tightening of blood vessels. In guys, the spongy tissue also tightens back up and makes it harder for blood to get in. This makes it difficult to get or keep an erection.

Other factors that can prevent a guy from getting or maintaining an erection include lack of attraction to a partner, a negative body image, a lack of self-esteem, problems in relationships, or using alcohol or other drugs. Certain conditions, such as diabetes, and medications, such as certain antidepressants, can also cause problems with erections.

While most guys occasionally have problems getting erections, if a guy frequently experiences erection problems, it's a good idea to talk to a health care provider, because there can be many different causes. Call 1-800-230-PLAN to find a Planned Parenthood health center near you.

Hope this information helps!

Take care,

teenwire.com^® Editors

This column is for informational purposes only and is not intended to constitute medical advice, diagnosis, or treatment. If you have a medical problem, please call toll-free 1-800-230-PLAN for an appointment with the Planned Parenthood health center nearest you.