Erectile dysfunction: when an erection is not firm enough or does not last

How an erection becomes firm

An erection involves arousal, nerves and blood vessels working together. Smooth muscle in the erectile tissue relaxes, more blood flows in, and the filled tissue restricts blood from flowing back out through the veins. Pelvic floor muscles also contribute to firmness. The review Erectile hydraulics explains this process.

Size and firmness are therefore separate things. A visible erection may still be too soft for penetration, while an erection that is not at maximum firmness throughout may be sufficient for the sexual activity you want. There is no single firmness number everyone must reach. What matters is whether the erection is adequate and reliable for you.

The four grades: understanding the Erection Hardness Score

The Erection Hardness Score, or EHS, expresses your own perception in four simple grades. It can help you describe changes more accurately when speaking to a doctor.

EHS 1: enlarged, but not hard

The penis increases in size but does not yet have adequate firmness.

EHS 2: hard, but not enough for penetration

An erection is present, but its firmness is not sufficient for penetration.

EHS 3: sufficient for penetration, but not completely hard

Penetration is possible even though the erection is not at the highest firmness.

EHS 4: completely hard and rigid

This is the highest grade on the scale.

The scale has been investigated in research, including a study of the relationship between EHS and intercourse. It measures perceived firmness, not the cause of a problem or the quality of sex. EHS 3 is not automatically abnormal, and EHS 4 does not guarantee desire or well-being. Duration matters as well: an erection that is firm but fades quickly may still be a significant problem.

Why an erection sometimes fades

Sexual arousal does not follow a straight path. Touch, pace, distraction, tiredness and a sense of safety may change during an encounter. An erection that softens during a pause and returns with pleasurable stimulation is different from repeated difficulty despite sufficient arousal.

Putting on a condom or preparing for penetration can bring added pressure: now it must work. Attention moves from touch to checking the erection. A pause, more time and an approach without a fixed goal may reduce the pressure. Check the fit and practise putting on a condom when you feel relaxed, so that you stay protected even when you feel nervous.

For a later medical discussion, remembering typical situations is enough. There is no need to test or assess your erection every day.

Physical causes, stress and medicines

The simple distinction between physical and psychological causes often does not fit. An erection that is slightly less reliable for physical reasons can create performance pressure; that pressure may then make the next encounter more difficult.

Blood vessels and metabolism

Diabetes, high blood pressure, raised blood lipids and smoking can impair blood vessel function. Lack of physical activity and significant excess weight may also contribute.

Nerves, hormones and changes in the penis

Nerve injuries, some neurological conditions or pelvic procedures can affect erections. Hormonal disorders, pain or a new curvature should also be assessed.

Psychological and situational strain

Stress, anxiety, depressive symptoms, conflicts and distressing sexual experiences can affect arousal and erections. Younger people may be affected too.

Medicines and substances

Some blood pressure medicines, antidepressants, sedatives and hormone treatments can play a role. Heavy alcohol use and other drugs may also interfere. Do not stop prescribed medicines on your own; discuss whether the timing of symptoms is related.

The NIDDK information on symptoms and causes provides an overview of these possible triggers. Such a list does not establish which cause applies to you.

What morning erections and masturbation can tell you

If erections occur in the morning or during masturbation but are unreliable during sex with a partner, expectations and context can play an important role. This does not mean that the symptoms are imaginary. It also does not mean that attraction is lacking or that anyone is to blame.

Conversely, not having a noticeable morning erection does not prove vascular disease. Sleep and the moment you wake influence what you notice. These observations are useful clues to discuss, not reliable self-tests. Physical and situational factors may coexist.

Desire, erection and orgasm are linked, but they are not identical. A less firm erection alone therefore does not indicate how aroused someone is. The article about orgasm explains more about this relationship.

Why heart and blood vessel health also matter

New or worsening erection problems may be a reason to check blood pressure, blood glucose, blood lipids and other vascular risks. Erectile dysfunction and cardiovascular disease share important risk factors; with vascular causes, erectile dysfunction can appear before heart disease is recognised.

This does not mean that every soft erection indicates a heart problem. It explains why a good assessment goes beyond sexual function. The EAU guideline on erectile dysfunction specifically addresses this connection.

What happens during a medical assessment

A first consultation can be with a general physician or urologist. It usually starts with the history: when did the problem begin, how often does it occur, and does it concern becoming firm, maintaining the erection or both? Questions about desire, pain, medicines, existing conditions and stress are also relevant.

Depending on the situation, an examination, blood pressure measurement and blood tests may follow, for example to check glucose metabolism, blood lipids and hormones. An abnormal result needs to be interpreted alongside the symptoms. Ultrasound and specialised function tests are not needed at every first visit. The NIDDK information on diagnosis describes the process.

You can note down the following before your consultation:

• When the problem started, how often it occurs and the situations in which erections are better or worse.
• Whether the erection does not become firm enough, fades too early, or both.
• Changes in desire, pain, curvature, ejaculation or urination.
• All medicines and supplements, including erection products bought on your own.
• What you hope to achieve with treatment and what troubles you most.

Can erection firmness be measured objectively?

Yes, but different methods measure different properties. Devices such as RigiScan can record changes in circumference and firmness during the night; Doppler ultrasound examines blood flow. These tests answer specific diagnostic questions. One measurement cannot replace a conversation or an understanding of everyday sexual experiences.

Elastography examines tissue properties using ultrasound. A small study involving 37 healthy men showed measurable changes during erection. This does not establish a universal upper limit for firmness or a need for routine testing. Firmness under pressure from the side and resistance to buckling are different measurements as well.

For you, the more practical question is usually: which investigation would actually change the next steps in treatment?

Changes you can make yourself

There is no reliable instant solution for every cause. Useful steps support your health and reduce pressure around sex: regular exercise, less alcohol, stopping smoking and adequate rest. These steps do not guarantee success, and continuing symptoms are not your fault. People who live healthily can still develop erection problems requiring treatment.

In your sex life, it can help to avoid linking touch immediately with penetration. Allow space for a pause, other forms of closeness or a slower beginning. If the erection softens, the whole encounter does not have to end. How does sex work? provides a broader overview.

Start with changes you can realistically make instead of trying to perfect sleep, exercise, diet and sex at the same time. With recurring symptoms, these measures can support treatment, but they should not keep delaying a medical appointment.

Breaking the cycle of pressure and checking

After an unsettling experience, anticipating the next encounter can itself become a problem. During sex, you keep checking whether the erection is holding. That attention is then diverted from arousal, and every change feels like proof that things are going wrong again.

Talking outside a sexual situation can ease pressure. Explain what makes you uncertain, which touches feel pleasant and that a pause is not a rejection. Together, you can agree that penetration is an option without making it a requirement.

Psychosexual counselling or sex therapy can help, especially with anxiety, avoidance or relationship conflict. It can be combined with medical treatment. If premature ejaculation is also troubling you, mention both difficulties so that treatment can address them together.

Sildenafil and tadalafil: what tablets can do

Sildenafil and tadalafil are known as PDE-5 inhibitors. They support the body's erection response but do not create desire and need sexual stimulation. The choice of medicine depends partly on coexisting health conditions, other medicines and your preferred timing.

A meal can delay the onset of sildenafil's effect. Tadalafil has a longer window of action; in some cases, a doctor may prescribe daily use. A longer window does not mean a continuous erection. The EMA information on tadalafil explains how it is used.

An unsatisfactory first attempt does not prove that the treatment cannot help. Discuss the timing, stimulation and expectations instead of increasing the dose yourself or combining several medicines. Possible side effects include headaches, facial flushing and indigestion. The EMA information on sildenafil describes its effects, side effects and restrictions.

PDE-5 inhibitors must not be combined with nitrates for angina or with poppers. Blood pressure can fall dangerously. Certain other medicines, such as riociguat, also rule out this combination. Before starting treatment, tell the doctor about every medicine and substance you use. Serious heart problems also require an assessment of whether sexual exertion is currently safe.

Buying from an uncertain source does not replace this assessment. Ask a doctor and pharmacist for advice about an approved medicine.

What other treatments are available?

If tablets are unsuitable or do not help enough, other treatment options remain. The choice depends on what is affecting the erection and which method is practical for you.

Vacuum erection devices

Negative pressure draws blood into the penis, and a suitable ring can maintain the erection. The method of use, possible side effects and safe duration of use should be explained.

Local medicines and injections

Certain medicines can be administered in the urethra or injected into the erectile tissue. This requires medical instruction and a clear plan for an erection that lasts too long.

Penile implants

Surgery can be an option for selected people when other methods are unsuitable or unsuccessful. Benefits, risks and the permanent change must be discussed thoroughly beforehand.

The NIDDK information on treatment describes these options and the accompanying counselling. Along with effectiveness, decisions should take account of tolerability, practical use and what you want from your sexual life.

Testosterone, pelvic floor training and supplements

Testosterone is not a general erection-enhancing medicine. Treatment may be appropriate for a confirmed deficiency and matching symptoms, not simply for a softer erection. A low result is checked with another morning blood sample taken while fasting. This is especially important when trying to conceive: taking testosterone can suppress sperm production. The Endocrine Society guideline advises against this therapy when planning to conceive in the near future.

Supervised pelvic floor training may help some people. A small randomised trial studied exercises together with biofeedback, which provides feedback on muscle activity. This does not guarantee that any exercises done at home will work. If you have pain or muscle tension, get guidance on suitable training. Investigating other causes remains important.

Be particularly careful with supplements and supposedly natural sexual enhancement mixtures. Many products lack convincing evidence of effectiveness, and some contain undeclared pharmaceutical ingredients. The information on sexual enhancement products from the US research centre NCCIH highlights this issue. When offered additional treatments, ask how strong the evidence is that it will help in your situation, which risks exist and what alternatives are available.

Erection problems when trying to conceive

When sex feels as though it must happen successfully on fertile days, extra time pressure may arise. Erection firmness does not reliably indicate sperm quality. Difficulties with intercourse and possible reduced fertility should be considered separately.

Mention that you are trying to conceive during the consultation, including before any medicine is prescribed. This allows treatment and family planning to be coordinated. The article Erection problems when trying to conceive explores this particular situation further.

When to seek medical help

Arrange a consultation if symptoms recur, worsen or cause distress. This is particularly important with diabetes, vascular risks, new medicines, markedly reduced desire or pain. A new curvature, a lump you can feel in the penis, blood in urine or significant urinary symptoms also need assessment. With blood in semen, recurrence and accompanying symptoms are among the factors to consider.

If an erection has lasted three to four hours and is not going down, go to an emergency department immediately. Severe pain means you need help sooner. With sickle cell disease, this applies to a painful erection lasting more than one hour. Such a persistent erection, called priapism, can damage tissue. Do not wait for sex or masturbation to end it. The NHS information on priapism explains why this is urgent.

Acute chest pain, severe breathlessness or sudden paralysis or speech difficulties are emergency signs: call emergency services (112 in Germany). Tell the treating team which erection medicine you took and when, especially before any medicine for chest pain is given. Sudden severe testicular pain, or sudden loss of vision or hearing after an erection medicine, also needs immediate medical assessment.

Myths and facts

Only a maximally firm erection is normal.

Firmness can vary. Adequate function, reliability and your symptoms matter, rather than maintaining the highest grade at all times.

In younger people, the cause is always psychological.

Physical causes are possible at a younger age too. Age alone does not replace an assessment.

If it works alone, attraction to the partner is missing.

That cannot be concluded from this pattern. The situation, pressure and stimulation may differ considerably.

An erection medicine automatically removes the cause.

Medicines can support erections but do not automatically resolve vascular problems, side effects or distressing performance pressure.

Conclusion

Good treatment for erectile dysfunction begins with understanding what has changed and what you need. Whether erections stay too soft, fade early or become unreliable only under pressure, recurring symptoms can be assessed and often treated. Discuss the problem openly, consider possible physical causes and make room for sex without constantly judging firmness.