Cushings A Master Of Disguise

Overview

Cushing's syndrome is a condition where the body has too much of a hormone called cortisol. Cortisol is often called the 'stress hormone' — it helps you respond to stress, keeps blood sugar and blood pressure steady, and helps your body use food for energy. When cortisol stays high for a long time, it gradually changes many parts of the body: how fat is stored, how skin and muscles repair, how bones stay strong, and how mood and sleep work. Because these changes build up slowly and can look like many other common problems — weight gain, high blood pressure, tiredness, low mood — Cushing's is sometimes called a 'master of disguise'. That name is a reminder that it can hide behind other diagnoses for a while, not a reason to worry.

No, it is uncommon. Cushing's syndrome caused by the body's own hormone problems is rare. Cushing's caused by steroid medicines is more common, because these medicines are widely prescribed for conditions like asthma, arthritis and inflammatory diseases.

It can affect anyone at any age. When it is caused by a problem in the body's own hormone system, it is most often found in adults between about 20 and 50, and women are affected more often than men. It can also occur in children. People who take steroid medicines for a long time — as tablets, injections, inhalers, creams or drops — are at higher risk.

Symptoms

Common symptoms

• Weight gain, especially around the tummy, while arms and legs may stay slim
• A rounder, fuller face (sometimes called a 'moon face')
• Extra fat at the base of the neck and top of the back
• Skin that bruises easily and heals slowly
• Purple or pink stretch marks, often on the tummy, thighs, breasts or arms
• Thinning skin and thin arms and legs
• Muscle weakness, especially in the thighs and shoulders — for example, difficulty standing up from a low chair or climbing stairs
• Feeling very tired, or having trouble sleeping
• High blood pressure
• Higher blood sugar, or being diagnosed with type 2 diabetes
• Mood changes — feeling low, anxious or irritable
• More infections than usual, or infections that take longer to clear
• Acne, and extra fine hair growth on the face or body
• Irregular or missed periods, and lower sex drive
• Bone pain or broken bones from minor knocks

Symptoms in children

• Weight gain, often with slowing of height growth — a child may put on weight but not grow taller as expected
• A rounder face and extra fat around the middle
• Feeling very tired, or doing less well at school
• High blood pressure or high blood sugar found by a doctor
• Delayed puberty, or puberty that does not progress as expected
• Mood changes or behaviour changes

Symptoms in older adults

• Muscle weakness and falls, which may be put down to ageing
• High blood pressure or diabetes that is hard to control
• Easy bruising and thin skin, often attributed to 'thin blood' or age
• Low mood, poor concentration or memory changes
• Bone thinning and fractures after small knocks
• Swelling in the legs, or generally feeling unwell without a clear reason

Causes

Main causes

• Steroid medicines (often called glucocorticoids) taken for a long time — by mouth, injection, inhaler, cream or eye drop. This is the most common cause overall.
• A small growth (adenoma) in the pituitary gland at the base of the brain that makes too much of a hormone that tells the adrenal glands to produce cortisol. This is called Cushing's disease.
• A growth in one of the adrenal glands (small glands sitting on top of the kidneys) that makes too much cortisol.
• Very rarely, a growth elsewhere in the body — for example in the lungs — that produces the hormone that switches on cortisol production.
• Rarely, inherited conditions that run in families and affect the hormone glands.

Risk factors

• Long-term use of steroid medicines, especially tablets or injections
• Having other hormone-related conditions, such as pituitary or adrenal problems
• A family history of hormone gland tumours or inherited conditions affecting the endocrine system
• Having a growth found in the pituitary or adrenal glands

When to see a doctor

See a doctor urgently if:

• You take steroid medicines and become suddenly unwell with vomiting, diarrhoea, dizziness or confusion — seek urgent help the same day or call emergency services
• Severe headache with vision changes or confusion
• Sudden severe mood change or thoughts of harming yourself
• Signs of a blood clot, such as a swollen painful leg or sudden breathlessness
• A fever with feeling very unwell, especially if you take steroid medicines

Book a routine appointment if:

• You have gained weight around the middle, or your face has become noticeably rounder, without a clear reason
• You bruise easily, or have new purple stretch marks
• You feel weak in the thighs or shoulders, or find stairs and standing up harder than before
• Your blood pressure or blood sugar keeps rising, or is hard to control
• Your periods have changed, or you have lost interest in sex
• You feel persistently low, anxious or irritable alongside physical changes
• You have been on steroid medicines for more than a few weeks and are worried about side effects — do not stop them on your own, ask your doctor first

Diagnosis

Your doctor will start by talking with you about your symptoms, your medical history and any medicines you take — including creams, inhalers and injections, which people often forget to mention. They will examine you, check your blood pressure and look at your skin, muscles and body shape. If Cushing's seems possible, they will arrange blood, urine or saliva tests to measure cortisol over a day. Because cortisol naturally rises and falls, one normal test is not always enough, and it can take more than one round of tests to be sure. If the tests suggest too much cortisol, further tests and scans help find where it is coming from.

Tests that may be done

• A urine test collected over 24 hours to measure how much cortisol your body makes in a day
• A saliva test late at night, when cortisol should normally be low
• A blood test taken in the morning, sometimes after taking a small steroid tablet the night before, to see whether cortisol switches off as it should
• A blood test to measure the hormone that controls the adrenal glands
• A scan of the pituitary gland (usually an MRI scan) or of the adrenal glands (usually a CT scan)
• Blood tests for blood sugar, cholesterol, potassium and other salts
• A bone density scan, as cortisol can weaken bones
• Sometimes, a scan of the chest or other areas if the usual tests do not explain the findings

What to expect at your appointment

The tests themselves are simple — mostly blood, urine or saliva samples, with scans if needed. Waiting for results can be stressful, and it is common to need repeat tests or to be referred to a specialist in hormone conditions (an endocrinologist). Try to keep a note of your symptoms, your blood pressure readings and all the medicines you use, including anything you buy over the counter. Ask your doctor to explain each step and what the results mean for you.

Treatment

Treatment depends on why cortisol is too high. The aim is to bring cortisol back to a healthy level, relieve symptoms and protect your bones, heart and blood sugar. If a steroid medicine is the cause, your doctor will plan a careful, slow reduction — never stop these medicines suddenly, because your body needs time to restart its own cortisol production. If a growth in the pituitary or adrenal glands is the cause, surgery is often the main treatment, sometimes followed by other approaches. Recovery is usually gradual, and some symptoms settle faster than others.

Self-care at home

• Take your medicines exactly as prescribed and ask your doctor or pharmacist before changing anything
• Check your blood pressure at home if your doctor suggests it, and write the readings down
• Be gentle with your skin and protect it from cuts and sun; use a soft toothbrush and moisturise dry skin
• Move regularly within your comfort — short walks and gentle strength exercises help protect muscles and bones
• Ask about bone health, calcium and vitamin D, and whether a bone scan is appropriate for you
• Keep a simple symptom diary — mood, sleep, energy, weight, blood pressure — it helps your care team see patterns
• Tell any doctor, dentist or nurse that you have Cushing's syndrome or take steroid medicines, especially before procedures or if you become unwell

Medical treatments

Treatment is tailored to the cause. If steroid medicines are responsible, the plan is usually to use the lowest dose that controls your underlying condition and to reduce it slowly under medical supervision, sometimes switching to a different form. If the body is making too much cortisol, surgery to remove the growth is often the first option. When surgery is not possible or does not fully work, doctors may use medicines that reduce cortisol production or block its effects, and sometimes radiotherapy to the pituitary gland. Everyone on treatment needs monitoring — blood tests, blood pressure checks and bone health checks — and sometimes a short course of steroid replacement while the body recovers. Your specialist team will explain the options, benefits and drawbacks for your situation.

When is surgery considered?

Surgery is usually considered when a scan shows a growth in the pituitary or adrenal glands that is making too much cortisol. The type of operation depends on where the growth is; some are done through the nose, others through keyhole surgery in the abdomen. Your team will discuss the risks, the expected recovery and the chance that the problem could return. Sometimes surgery is not the right choice, and medical treatment or radiotherapy is used instead.

Living with this condition

Living with Cushing's can be tiring and emotionally draining, especially because the changes happen slowly and other people may not realise how much you are coping with. Recovery after treatment usually takes months, and it is normal to have good days and harder ones. Pace yourself, accept help where it is offered, and keep in regular contact with your care team so adjustments can be made as you improve.

Lifestyle tips

• Keep active in a way that suits you — gentle walking, swimming or light strength work can help muscles and mood
• Aim for regular sleep and a consistent daily routine where possible
• Limit alcohol and avoid smoking, as both put extra strain on your heart and bones
• Ask your doctor or pharmacist to review all your medicines, including supplements and over-the-counter products
• Protect your bones: avoid falls at home, keep pathways clear and use good lighting
• Stay connected with friends, family or a support group — isolation makes symptoms feel heavier

Diet and exercise

There is no special diet that cures Cushing's, but eating well helps your body cope. Aim for regular meals with plenty of vegetables, fruit, wholegrains and protein, and go easy on very salty and sugary foods, which can push up blood pressure and blood sugar. If you have been told you have diabetes or high blood pressure, your doctor may suggest a specific eating plan or a referral to a dietitian. For exercise, start gently and build up — muscle weakness is part of the condition, so progress may be slow. A physiotherapist can suggest safe strength and balance exercises, and this is especially useful if you have bone thinning or have had a fracture.

Mental health and emotional wellbeing

Cushing's syndrome can affect mood directly through hormones, and the visible body changes can affect confidence and relationships. Many people feel low, anxious, irritable or tearful, and some find it hard to concentrate. These feelings are part of the condition, not a personal failing, and they usually improve as cortisol levels come back to normal — though that can take time. Tell your doctor how you are feeling; talking therapies, support groups and, where appropriate, medication for mood can help. If you ever have thoughts of harming yourself or feel you cannot cope, please reach out right away: contact your local crisis line, your doctor, or your local emergency number. You deserve support and you do not have to manage alone.

Prevention

Most cases of Cushing's syndrome cannot be prevented, because they come from a growth in a hormone gland that no one can predict or avoid. What can be reduced is the risk from steroid medicines: they are valuable and often necessary, but they should be used at the lowest dose that works and for the shortest time needed. If you take steroid medicines long-term, have your dose reviewed regularly with your doctor, and never stop them suddenly — stopping too fast can make you seriously unwell.

Screening programmes

There is no routine screening programme for Cushing's syndrome in the general population. Screening may be suggested for people at higher risk — for example, those with several related conditions together, or families with an inherited tendency to hormone gland tumours. If you take long-term steroid medicines, your doctor should check your blood pressure, blood sugar and bone health regularly.

Complications

If left untreated

• Type 2 diabetes and high blood pressure, which raise the risk of heart disease and stroke
• Weakening of the bones (osteoporosis) and fractures from minor knocks
• Muscle wasting and weakness, affecting mobility and independence
• More frequent infections and slower healing of wounds
• Blood clots in the legs or lungs
• Depression, anxiety and difficulties with memory and concentration
• Irregular periods and reduced fertility
• In rare cases, a dangerous drop in cortisol if a growth suddenly stops or is removed without replacement treatment — this is why people on treatment need clear advice about when to seek urgent help

Long-term outlook

The outlook is generally encouraging. When the cause is found and treated, most people notice improvement, though it usually happens gradually over months rather than weeks. Some changes — such as weight, muscle strength and skin — take longer to settle, and mood often improves as hormone levels normalise. Regular follow-up matters, because there is a chance the problem can come back and your care team will want to check for that. Many people go on to live full, active lives. If progress feels slow, keep talking to your team — adjustments are often possible.

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