Andropause – explained by Dr Derek Koh
Andropause
What is testosterone?
Symptoms & outcome of andropause
Andropause self-assessment
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Dr Derek Koh graduated in 1992 with a basic medical degree & subsequently received his post-graduate diploma in Family Medicine, both from the National University of Singapore. He is also Board Certified in Anti Aging Medicine & has attained his Fellowship with the American Board of Anti-Aging and Rejuvenation Medicine.
Dr Koh has completed local certifications in Practical Andrology conducted by the Academy of Men’s Health (Singapore) as well as post graduate training in Nutritional Protocols accredited by the Australasian College of Nutritional & Environmental Medicine. He is an EIMS certified physician in Exercise Prescription, an initiative launched by the American College of Sports Medicine.
Prior to this, Dr Koh was heading a health screening & wellness center in a major private hospital since 2008. His key interest is in Healthy Aging thru early detection and subsequent prevention thru lifestyle choices.
Dr Koh is a strong believer that everyone can add quality years to their lives while embracing an active lifestyle. He enjoys a variety of sports at leisure, including tennis & swimming.

Growing old gracefully has taken on a new meaning in the last few years.
In the past, it referred to growing old “without any work” done. These days, with plastic surgery so pervasive, growing old gracefully means growing old with “only minimal work” done. And B*tox and Fillers are as minimal as it gets in aesthetics. Let’s talk about dermal fillers in this blog, shall we?

All areas on the face, from the forehead down to the chin can be safely and effectively treated with dermal fillers. Here are the more common areas that are treated.
At David Loh Surgery, we excel in the art of dermal filler injections having published our special injection technique (The DL Lift) as an instructional guide for doctors in PRIME, International Journal of Aesthetic and Anti-Ageing Medicine in 2018.
The price for dermal fillers costs $800 per syringe of 1ml. Check out our price list
WhatsApp +65 8878 8045 , call us +65 6733 5300, or send us an email here.
All of the reputable brands of modern fillers contain an anaesthetic called lidocaine which takes away the discomfort of filler injections. You shouldn’t settle for less.
The only sensation you will feel is the tiny needle entering the skin, and the sensation of movement (not pain) when the cannula is moved under the skin.
Yes, the results are immediate and “what-you-see-is-what-you-get”. Plus minus 10%-20% perhaps because of slight initial swelling. In fact most of the time, the results are natural enough and the patients are presentable enough to go out and meet friends immediately after a treatment. This actually gave rise to the term “lunchtime facelifts”.
The chances of getting a tiny bruise with filler injections is about 10%-30% depending on which areas are being treated. Also with multiple areas of treatment, there is also a higher chance of getting at least one bruise.
No doctor can guarantee bruise-free injections; after all needles and cannulas are involved in the process of filler injections. If a bruise occurs, it will need to run its natural course taking a 7-10 days to slowly disappear. Most of the time bruises are tiny and can be easily covered with a bit of makeup.
Besides bruising, which of course causes some swelling, there is often some swelling which unrelated to the bruises. This is a natural process in filler injections. This post injection swelling usually takes 3-7 days to subside.
WhatsApp +65 8878 8045 , call us +65 6733 5300, or send us an email here.

Filler injections are only as safe your doctor’s knowledge of the anatomy of the face. So don’t settle for non-medically trained injectors like beauticians. In fact, best to approach doctors that do filler injections frequently than those who do not.
With proper training and experience, filler injections are generally very safe.
Our doctors are trainers for other doctors. Dr David Loh has published in medical literature on the prevention and management of filler complications. One of the papers have been awarded a Best Paper (Gold) Award by the Plastic and Reconstructive Journal (PRS Global Open) in 2019.
The other aspect about safety with regard to dermal fillers is the filler material itself. As a filler material, hyaluronic acid fillers have been safely used on millions of patients since the 1990s. Without mentioning brands here, we are of the opinion that only biodegradable non-permanent fillers are safe. This is because they do not hang around long enough to cause granulomas or infections. And as the face changes, as it inevitably will over the years, fillers can be topped up to suit the changes associated with aging.
WhatsApp +65 8878 8045 , call us +65 6733 5300, or send us an email here.
Dr David Loh is one of the first trainers and mentors in aesthetic medicine in Singapore. He developed and published in medical literature his filler injection techniques as instructional pieces for other doctors. He also published in medical literature his works on the prevention and management of filler complications.
WhatsApp +65 8878 8045 , call us +65 6733 5300, or send us an email here.
The “overfilled syndrome” is an unfortunate term coined by some doctors with the intention to disparage the work of other doctors. These doctors bring up isolated incidents of overfilled media celebrities to discourage patients from have filler injections. Perhaps these doctors are themselves not skilful enough nor experienced in filler injection, hence they try to divert clientele to the non-injection treatments. As a patient-consumer, you should be able to discern this kind of marketing tactics.
What you need to know is that you would need an incredible amount of filler material (maybe >20 syringes) to reach the kind of caricatured appearance of some of these celebrities. The so called “overfilled syndromes.” These celebrities can afford it but most patients would not be able to, and most conscientious doctors would hold back the patients before they even reach that kind of look.
The fact of the matter is that most patients with early signs of aging actually would benefit a great deal from filler injections into the fat compartments that have begun to shrink. This not only reverses the early signs of aging, but it can even prevent sagging.
Overfilled syndrome can easily be avoided as long as there is clear communication between doctor and patient. Clear goals and expectations are aligned prior to the procedure, and the doctor has restraint in his or her approach, with the aim of creating a natural result while resolving the concerns of facial aging such as sagging and volume loss.
WhatsApp +65 8878 8045 , call us +65 6733 5300, or send us an email here.
Improving Appearance is what we do everyday. Not making our patients look like someone else, but making them more confident through the art of the DL Lift and other techniques of filler injections. Bring out their best features and still being themselves. This is the essence of Enhancing Confidence.
WhatsApp +65 8878 8045 , call us +65 6733 5300, or send us an email here.
A couple of things happen as we age. The fat compartments under the eyes above the cheeks shrink (atrophy is the scientific term). Thus reducing support for the skin and muscles around the eyes. The bones around the eye sockets also remodel (change shape) which causes even greater loss of support for the overlying soft tissues. This sagging in the under eye area gives rise to the signs of aging. And dermal fillers are a great way to reduce the signs of under eye aging.

The treatment however is relatively simple. Dermal fillers when skillfully injected into the fat compartments in the under-eye area provides support and resolves most of the above problem features. The dermal filler is carefully placed using a cannula (a needle with a rounded tip) to minimize trauma. The dermal filler spreads evenly over the areas treated. Lumpiness is rare with the cannula technique of injection. Bruising can sometime occur even with a cannula but are usually quite minimal.
As far as safety is concern, opinion differs. But cannulas a generally accepted as the gentle method in this area while blood vessels are a plenty. Here is a paper by Dr David Loh on safety in filler injections
As for the crepey skin in the under eye area, the dermal fillers can help somewhat, but usually a bit of laser to tighten up the skin, and reduce the fine lines, and that’s all it takes to brighten up the look. The fractional CO2 laser is good, but has a bit of downtime. Otherwise, Sylfirm or Thermage eyes are not too bad too.
September 2019
PRESS RELEASE
A medical case report by David Loh Surgery has been awarded the PRS Global Open 2019 ‘Best Case Report’ (Gold) by international medical journal Plastic & Reconstructive Surgery.
With facial fillers being a widely available aesthetic procedure to temporarily reduce the appearance of wrinkles, or contour faces, there have been some cases where patients have developed features of “impending skin necrosis”: discolouration of the skin due to the premature death of skin cells, in reaction to soft tissue augmentation resulting from the injection. While rare, this complication may occur even under the care of experienced injectors.
David Loh Surgery’s founder Dr David Loh and partner Dr Phoon Yi Shan, who is in charge of the branch clinic at Novena Medical Centre, together with two other doctors jointly authored a case report on such an incident which was successfully managed with prompt diagnosis and treatment.
Entitled Successfully Managing Impending Skin Necrosis following Hyaluronic Acid Filler Injection, using High-Dose Pulsed Hyaluronidase, the paper was first published by PRS Global Open in its February 2018 issue. Using data collected on the article’s view count and sharing activity, among others, David Loh Surgery’s case report was then scored and selected by the journal’s editorial and publishing staff for the award.
“We are very honoured to represent Singapore in contributing to the global body of medical knowledge with our recent case report on successfully managing hyaluronic acid filler-induced impending filler necrosis,” says Dr David Loh, founder and medical director of David Loh Surgery.
“This accolade from PRS Global Open, as an open-access and peer-reviewed international journal, bears testament to our commitment to furthering safety and standards in aesthetic medicine. The culture of knowledge sharing and continuous learning is very much in line with our philosophy at David Loh Surgery,” he adds.
Plastic and Reconstructive Surgery is the official publication of the American Society of Plastic Surgeons. The title launched Plastic and Reconstructive Surgery – Global Open, in April 2013 as a companion journal with an intention to globalise plastic surgery research, collaboration, and best practice sharing through its open access platform.
PRS Global Open holds its annual Best Paper Awards event with the aim of recognising the best new papers by both US and international authors across multiple categories including that of Best Case Report under which Gold, Silver and Bronze Awards are presented.
David Loh Surgery’s award-winning case report can viewed in full here:
https://journals.lww.com/prsgo/pages/collectiondetails.aspx?TopicalCollectionId=56