Lyme Disease in the UK: Symptoms, Prevention and Online Doctor Advice

Lyme disease, or Lyme borreliosis, is a bacterial infection transmitted to humans through the bite of an infected tick. In the United Kingdom, the primary carrier is the Ixodes ricinus, commonly known as the sheep tick or wood tick. These small, spider-like arachnids are found across the UK, particularly in areas of high grass, woodland, and heathland.

While not every tick carries the bacteria (Borrelia burgdorferi), the number of cases in the UK has been steadily increasing. According to NHS and UK Health Security Agency (UKHSA) data, there are an estimated 3,000 to 4,000 laboratory-confirmed cases each year, though the actual figure may be higher as many cases are treated based on clinical symptoms alone. Lyme disease is not contagious between humans; it requires the vector of a tick bite to spread.

One of the most characteristic signs of Lyme disease is a distinctive skin rash known as erythema migrans. This is often described as a 'bullseye' rash because it typically features a red circular patch with a clearer area in the centre, though it can also appear as a solid red or pink patch.

Key features of the Lyme disease rash:

• It usually appears 3 to 30 days after being bitten.
• It expands slowly over several days, often reaching over 5cm in diameter.
• It is generally not itchy or painful, but may feel slightly warm to the touch.
• On darker skin tones, the rash may look like a darker patch or a bruise.

It is crucial to note that approximately 30% of people infected with Lyme disease do not develop a rash. In these cases, early symptoms may resemble a viral infection, such as the flu, making it harder to identify without a known history of a tick bite.

Beyond the rash, Lyme disease can manifest through a range of systemic symptoms. If the infection is not caught in the early stages, the bacteria can spread to the nervous system, joints, and heart.

Early symptoms (days to weeks):

• High temperature (fever) and chills.
• Muscle and joint pain.
• Headaches and neck stiffness.
• Persistent fatigue and a general feeling of being unwell.
• Swollen lymph glands.

Later symptoms (weeks to months):

If left untreated, patients may experience more severe complications, including inflammatory arthritis (often in the knee), facial palsy (drooping of one side of the face), nerve pain, and in rare cases, heart palpitations or inflammation of the brain (meningitis).

Prevention is the most effective way to avoid Lyme disease while enjoying the British countryside. Ticks do not fly or jump; they wait on vegetation and cling to passing animals or humans—a process called 'questing'.

How to prevent tick bites:

• Stick to clearly defined paths and avoid walking through long grass or bracken.
• Wear light-coloured clothing so ticks are easier to spot.
• Tuck your trousers into your socks and wear long-sleeved shirts.
• Use insect repellents containing DEET on skin and clothing.
• Check yourself, your children, and your pets thoroughly for ticks after being outdoors.

How to remove a tick safely:

If you find a tick attached to your skin, it should be removed as soon as possible. The risk of infection is low if the tick is removed within the first 24 hours. Use a dedicated tick-removal tool or fine-tipped tweezers. Grasp the tick as close to the skin as possible and pull upwards with a steady, even pressure. Do not twist or jerk the tick, and avoid using substances like petroleum jelly, alcohol, or fire, as these can increase the risk of the tick regurgitating bacteria into your bloodstream.

If you have recently spent time in a tick-prone area and notice a circular rash or feel 'flu-ish', you should seek medical advice promptly. You can speak to a GP online for a clinical assessment, which is particularly useful if you have taken a photograph of a suspicious rash.

A GP will typically diagnose Lyme disease based on your symptoms and history of exposure. If you have the erythema migrans (bullseye) rash, NICE guidelines state that you should be started on a course of antibiotics immediately without the need for a blood test, as the rash is pathognomonic (unique) to the infection. If you have symptoms but no rash, the GP may arrange for a blood test to look for antibodies. However, these tests can be negative in the first few weeks of infection, so a follow-up test may be required if symptoms persist.

Lyme disease is highly treatable with a course of oral antibiotics, such as doxycycline or amoxicillin. The standard course lasts between 10 and 21 days, depending on the severity and stage of the infection. It is vital to complete the full course of antibiotics even if you start to feel better.

Most people who are treated early make a full and rapid recovery. A small number of patients may continue to experience symptoms like fatigue and muscle ache for several months; this is sometimes referred to as 'post-treatment Lyme disease syndrome'. While the exact cause is unknown, it is generally managed with supportive care rather than long-term antibiotics, in line with NHS guidance.