
Dr Tan Kok Kuan
Men’s Health & Sexual Health Doctor
MBBS (S’pore), Cert. Men’s Health, Cert. Clinical Dermatology,Member, Academy for Men’s Health (Singapore)Member, Singapore Association for the Study of ObesityMember, International Society of Sexual Medicine

Low libido can sometimes be a sign of an underlying health condition, particularly when the change is persistent, unexplained or accompanied by other symptoms. In men, reduced sexual desire may be associated with disorders, chronic illness or mental health concerns. However, temporary changes can also occur because of stress, poor sleep, relationship difficulties or major life changes.
Identifying the cause matters because treatment should address the factor affecting sexual desire rather than assume that every man with low libido requires testosterone treatment. A medical assessment can consider when the change began, what other symptoms are present and whether physical, psychological or medication-related factors may be involved.
Health conditions that commonly contribute to low libido in men include hormonal disorders, diabetes, obesity and chronic illnesses that affect energy or general wellbeing. These conditions may influence sexual desire directly or through related problems such as fatigue, erectile difficulties, pain and emotional distress.
Low testosterone may directly reduce sexual desire, while thyroid disorders and elevated prolactin can disrupt the hormonal signals involved in libido and sexual function.
Diabetes and obesity may affect libido through changes in hormone levels, energy and overall health. Associated problems such as fatigue, poor sleep or erectile difficulties can also reduce interest in sexual activity.
Heart disease, chronic kidney or liver disease, cancer and chronic pain may reduce libido by affecting energy, physical comfort and emotional wellbeing. The condition itself and the demands of ongoing treatment may both contribute.
Certain medications can reduce sexual desire by affecting brain chemistry, hormone levels or sexual function. Antidepressants, particularly some selective serotonin reuptake inhibitors, are commonly associated with reduced libido, difficulty becoming aroused or delayed orgasm.
Some blood-pressure medicines may contribute to sexual difficulties, while long-term opioid use can suppress testosterone production and reduce desire. Antipsychotic medicines, anti-androgen treatments and certain drugs used for prostate conditions may also affect libido.
If the change began after starting a medicine or adjusting its dose, a doctor can review whether the treatment may be contributing and discuss suitable alternatives. Prescribed medication should not be reduced or stopped without medical guidance.
Depression, anxiety and chronic stress can reduce libido by affecting mood, energy, concentration and the brain’s response to sexual stimulation. Poor sleep may compound these effects by increasing fatigue and disrupting the physical and emotional processes involved in desire.
Relationship conflict, reduced emotional closeness and unresolved concerns about sex can also affect interest. Erectile difficulties or worries about sexual performance may create anticipatory anxiety, causing a man to avoid intimacy and experience a further decline in desire.
These factors can have physical as well as emotional effects, and may occur alongside hormonal or medical conditions rather than as entirely separate causes.
You should seek out medical assessment at a sexual health clinic when low libido begins to impact your life negatively, affecting your emotional wellbeing, persists without explanation or is accompanied by other physical symptoms. Reasons for assessment include:
A sexual health clinic assesses low libido by examining when the change began, the circumstances in which it occurs and the physical, psychological or medication-related factors that may be contributing.
The doctor may ask about sexual desire, erections, relationships, mood, sleep and recent life changes. Existing health conditions, alcohol use, prescribed medicines and supplements are also reviewed to identify possible contributors.
A physical assessment may look for signs of hormonal or metabolic conditions. Depending on the symptoms, this may include checking blood pressure, weight, body hair distribution and the testes.
Blood tests may assess testosterone, thyroid function, prolactin and blood glucose. Testosterone deficiency is diagnosed by considering compatible symptoms together with consistently low levels, which generally requires more than one morning testosterone measurement.

Changes in sexual desire can fluctuate, and without a formal evaluation, it can be difficult to determine whether a drop in drive is a temporary phase or a sign of an underlying medical issue. Seeking a clinical consultation does not automatically mean committing to medical treatment, but it can offer you clarity on what is causing the change and whether targeted care may be required.
At Dr Tan Medical Center, Dr Tan Kok Kuan, our men’s health & sexual health doctor, has over two decades of experience in helping patients navigate sensitive sexual health concerns. He adopts a thorough approach that involves evaluating multiple factors at once before mapping out a personalised management plan.
Contact us today to book an appointment with Dr Tan and find out more about how our clinic can help you address low libido and other men’s health concerns.

Meet Our Doctor
Dr Tan Kok Kuan
Men’s Health & Sexual Health Doctor
MBBS (S’pore), Cert. Men’s Health, Cert. Clinical Dermatology,Member, Academy for Men’s Health (Singapore)Member, Singapore Association for the Study of ObesityMember, International Society of Sexual Medicine
Dr Tan Kok Kuan is an experienced doctor specialising in men's health, sexual health and medical weight loss. With over 20 years of clinical experience, he offers confidential and effective screening and treatment services. Notably, Dr Tan was one of the key authors of Singapore’s National HIV PrEP Guidelines and the national blueprint to end HIV transmission by 2030. Dr Tan frequently speaks at local and international conferences and has been featured in the media, where he helps raise public awareness around men’s health and sexual health.
“Every patient deserves our fullest attention.”
10 Sinaran Drive #09-30, Novena Medical Centre, Singapore 307506
Tel: (+65) 6513 0359 | WhatsApp: (+65) 9750 5037
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