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Deep Vein Thrombosis (DVT)
A blood clot forming in a deep vein, usually in the leg. It can be dangerous if part breaks off and travels to the lungs (pulmonary embolism).
Causes & risk factors
- Long periods of immobility (long flights, bed rest)
- Recent surgery or injury
- Pregnancy and hormone medicines
- Cancer
- Inherited clotting tendencies
Common symptoms
- Swelling in one leg
- Pain or tenderness in the calf
- Warm, red or discoloured skin
- Leg feeling heavy
Tests & diagnosis
- D-dimer
- Doppler ultrasound of leg
- Blood count
- Clotting tests
Treatment & management
- Blood thinners to stop the clot growing
- Compression stockings to reduce swelling
- Keeping mobile once treatment starts
- Clot-dissolving treatment or a filter in selected severe cases
- Treating any underlying cause
When to see a doctor urgently
- Call emergency services for sudden breathlessness, chest pain or coughing blood (possible clot in the lung)
- Seek urgent care for a painful, swollen leg
- See a doctor before long travel if you are at high risk
Not a diagnosis. MedDroid gives general educational information about deep vein thrombosis (dvt). It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Why is DVT serious?
A clot can break off and lodge in the lungs, which is life-threatening — so prompt treatment matters.
How can I prevent DVT on long journeys?
Move your legs regularly, stay hydrated and, if advised, wear compression stockings.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.