Written by: Professor Malcolm Carruthers
A man suffering from testosterone deficiency may experience some or all of the following symptoms:
- Decreased sex drive (libido)
- Erection problems, especially loss of morning erections
- Tiredness and a general loss of energy
- Depression and/or mood swings
- Weight gain, especially around the belly
- Poor concentration
- Short-term memory loss and ‘brain fog’
- Irritability
- Increased sweating, including night sweats
- Hot flushes
Of these, fatigue, depression, irritability, reduced sex drive and erection problems are the most common. However, not everybody with the condition will have all of these symptoms and the severity of each will vary from person to person. It is also important to recognise that many of these symptoms can be due to or contributed to by other causes, such as poor lifestyle and stress.

Research has shown that low or ineffective testosterone levels are also implicated in many of the severe, long term illnesses which become common in men with ageing. Metabolic syndrome and diabetes, Alzheimer’s disease, coronary heart disease and angina, and erectile dysfunction are illnesses where it has been shown testosterone deficiency can both be both part of the cause and be responsible for making the health consequences more severe.
Over the last 25 years, the Centre for Men’s Health has helped thousands of men with this condition regain their health and vitality and return to a fulfilling sex life.
Please contact us for more information about testosterone deficiency and to book an appointment for a medical assessment.
Further reading:
Causes of male testosterone deficiency
Testosterone deficiency diagnosis