Low Libido in a Relationship: When It Is a Mental Health Sign

When sex stops happening in a relationship, it is easy to assume the problem is attraction. Often it is not. Low libido is frequently a sign of something going on in the mind or the body, and treating it only as a desire problem can leave the real cause untouched.

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In short: Low libido in a relationship is often linked to mental health rather than attraction. Stress, depression, certain medications and exhaustion can all reduce desire, and the way a couple talks about this can either ease the strain or deepen it. Couples therapy offers a structured way to understand what is happening and rebuild closeness.

• Low desire is frequently caused by stress, depression or exhaustion, not a loss of attraction
• Many antidepressants, particularly SSRIs, list reduced libido as a known side effect
• Blame and pressure tend to make low libido worse, not better

What kills desire that is not attraction

Desire is sensitive to almost everything else going on in a person's life. It tends to be one of the first things to fade when someone is overwhelmed, anxious or low, long before they would describe themselves as unwell. The drop can feel sudden to a partner, but it is usually the end point of something that has been building quietly for weeks or months.

Common causes that have nothing to do with how someone feels about their partner include:

• Chronic stress and a mind that will not switch off at night
• Anxiety about work, money or family responsibilities
• Low self-esteem or discomfort with body image
• Unresolved resentment or hurt that has not been addressed
• Grief, loss or a major life change such as a new baby or bereavement
• Feeling emotionally unsafe, criticised or unseen within the relationship

It helps to separate the symptom from the story a couple tells themselves about it. A partner with low libido is not necessarily rejecting the other person. They may simply have very little left to give.

Medication, depression and exhaustion

Depression itself commonly reduces sex drive. When someone is depressed, the brain's capacity for pleasure and motivation is affected broadly, and sexual interest is often one of the first things to go. This can happen even in a relationship that otherwise feels stable and loving.

Medication adds another layer. Many treatments for depression and anxiety, particularly SSRIs, list reduced libido among their common side effects. This does not mean someone should stop taking medication that is helping them, but it does mean the cause of low desire might be pharmacological rather than relational, and worth raising with a GP rather than assumed to be a sign that something is wrong between partners.

Exhaustion plays a quieter but equally powerful role. Long hours, broken sleep, caring for children or ageing parents, or simply never having a moment to decompress all draw on the same limited reserves that desire depends on. When someone is running on empty, sex tends to be the first thing to be postponed, not because it matters less, but because there is nothing left after everything else has taken its share.

The conversation that does not make it worse

How this gets raised often matters more than what is actually said. A conversation that starts with blame, however gently intended, tends to push the other person further away and make the problem harder to solve.

A few things tend to help:

• Raise it outside the bedroom, at a calm moment, not right after being turned down
• Lead with curiosity rather than accusation: "I've noticed things have changed, how are you feeling in yourself?" rather than "Why don't you want me anymore?"
• Separate the behaviour from your worth. Low desire in a partner is rarely a verdict on you
• Avoid ultimatums or comparisons to how things used to be
• Give the conversation room to be inconclusive. Not every answer arrives in one sitting

It is also worth noticing your own reaction. Feeling hurt or rejected is understandable, but if that hurt turns into pressure, it can make the underlying cause, whether stress, depression or exhaustion, harder for your partner to admit to.

How couples therapy addresses it

Couples therapy is useful here because it treats low libido as a shared problem to understand rather than one partner's fault to fix. A therapist can help both of you work out what is actually going on, whether that is stress, unspoken resentment, a mental health condition, or the effect of medication, and separate that from the meaning you have each attached to it.

Sessions often focus on rebuilding safety and communication before anything to do with sex. Many couples find that once the underlying cause is named and no longer carrying extra weight from guilt or blame, both partners find it easier to be patient with each other.

If this has been going on for a while, or if conversations at home keep circling back to the same hurt without moving forward, it can help to see a couples therapist who can hold the conversation in a way that neither of you can manage alone in the moment. Mind a Porter is one option for finding a therapist suited to this kind of work in London or online across the UK.

What to do this week

Start smaller than you think you need to. Pick one calm moment this week to ask your partner how they are actually doing, without mentioning sex at all. If medication or low mood seems to be part of the picture, encourage a GP visit, or book one yourself if it concerns you. If you want a clearer sense of what support is available for your own low mood or anxiety, Mind has plain information worth reading before you decide what to do next. And if the conversation at home keeps stalling, consider whether a few sessions with a couples therapist might give you both the space to understand what has actually changed, rather than guessing at it alone.

Frequently asked questions

Why does my partner have no interest in sex? Low libido is frequently linked to your partner's mental health or physical state rather than a lack of attraction toward you. Common factors include chronic stress, exhaustion, depression, or even side effects from certain medications. These issues often cause someone to have very little emotional or physical energy left to give.

Can antidepressants cause a low sex drive? Yes, many medications prescribed for depression and anxiety, especially SSRIs, list reduced libido as a known side effect. If you suspect medication is the cause, it is worth discussing this with a doctor. You should avoid stopping any treatment without professional guidance, but a medical review can help determine if the cause is pharmacological.

How can we talk about intimacy issues without arguing? Try to start a conversation at a calm moment away from the bedroom, rather than immediately after being rejected. Lead with curiosity about how your partner is feeling in themselves instead of using accusations. It is important to avoid pressure, ultimatums, or comparisons to how your relationship used to be in the past.

Does couples therapy help with intimacy problems? Couples therapy allows you to treat low libido as a shared challenge rather than a problem for one partner to fix alone. A therapist helps you identify the underlying causes, such as stress or unresolved resentment, while rebuilding communication and safety. This process helps you separate the symptoms from the meaning you attach to them.