
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

Some of the most common sexual health problems in men include erectile dysfunction, premature ejaculation and low testosterone. These conditions can affect men of all ages, negatively impacting their sexual performance, sense of desire and overall confidence. Sexual health problems are often caused by a combination of physical, psychological and lifestyle factors, but may also be due to underlying medical conditions.
Understanding these conditions and their causes allows for earlier identification and more effective treatment. With proper medical evaluation, most sexual health issues may be managed through targeted therapies that address both the symptoms and their underlying causes.
Erectile dysfunction is the inability to achieve or maintain an erection sufficient for sexual activity. Erectile dysfunction often results from reduced blood flow to the penis, nerve dysfunction or hormonal imbalances. Common physical causes include:
Psychological factors such as stress, anxiety and depression can also interfere with sexual arousal and performance.
In many cases, erectile dysfunction is an early warning sign of underlying vascular disease, which is why medical evaluation is important if it becomes persistent and occurs consistently.
Premature ejaculation refers to ejaculation that occurs sooner than desired, often within about 1 to 3 minutes of penetration, along with difficulty delaying ejaculation and associated distress.
This condition may involve a combination of psychological, behavioural and biological factors. Psychological contributors such as anxiety, stress or performance concerns are common.
Other possible contributing factors include:
Premature ejaculation can affect confidence and relationship satisfaction, but it may be treatable with behavioural techniques and medical therapy from a specialist.
Low testosterone occurs when the body produces insufficient levels of the male hormone testosterone, leading to reduced sexual desire and function. It is also known as male hypogonadism. Abnormally low levels may result from medical conditions such as:
Men with low testosterone may experience symptoms such as decreased libido, fatigue, reduced muscle mass and mood changes. A proper diagnosis requires blood testing, and treatment depends on the underlying cause and severity of symptoms.
You should see a doctor for sexual health concerns if symptoms persist, worsen or begin to affect your confidence, relationships or quality of life. Early evaluation helps identify the underlying cause and allows for more effective treatment.
It is also important to consult a doctor if sexual health problems appear suddenly, as this may indicate an underlying condition such as cardiovascular disease, diabetes or hormonal imbalance.
Early medical assessment allows for accurate diagnosis and a tailored treatment plan. Addressing sexual health concerns in the early stages not only improves symptoms, but may also help detect and manage broader health issues before they worsen.

Sexual health problems such as erectile dysfunction, premature ejaculation and low testosterone are treatable conditions when properly diagnosed. A men’s sexual health doctor can assess your symptoms, identify the underlying causes and recommend a personalised treatment plan based on your specific needs and health profile.
Treatment may involve a combination of medical therapies, lifestyle modifications and, where appropriate, psychological support. The goal is not only to improve sexual function but also to address contributing factors such as cardiovascular health, hormonal balance and stress.
At Dr Tan Medical Center, patients receive discreet and structured evaluation tailored to individual needs. Dr Tan Kok Kuan, our men’s health and sexual health doctor, focuses on identifying underlying causes and contributing factors through clinical assessment and evidence-based management.
If you are experiencing ongoing sexual health concerns, contact us today to arrange a confidential consultation.

Dr Tan Kok Kuan
MBBS (S’pore), Cert. Men’s Health, Cert. Clinical Dermatology, Member, Academy for Men’s Health (Singapore) Member, Singapore Association for the Study of Obesity Member, 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
Operating Hours:
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Saturday: 9:00 AM to 2:00 PM
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