A 36-year-old woman, Aakriti, experienced recurrent, unexplained bruising on her arms and legs along with extreme fatigue. She could not recall any bumps or injuries. Her medical history revealed heavy menstrual periods and frequent over-the-counter use of ibuprofen for headaches. Blood tests showed a dangerously low platelet count of 3,000/µL (normal range: 150,000–450,000/µL). A peripheral blood smear indicated that her bone marrow was producing large platelets, but they were being destroyed in the peripheral blood. Tests for vitamin C and K deficiencies were normal, and there was no history of liver or kidney disease. Other causes of low platelets, such as leukemia, HIV, and hepatitis C, were ruled out.
Diagnosis: Primary Immune Thrombocytopenic Purpura (ITP)
Aakriti was diagnosed with Primary Immune Thrombocytopenic Purpura (ITP), an autoimmune disorder where the immune system mistakenly produces antibodies that destroy platelets. According to Dr. Vikas Sharma, women are more prone to ITP than men. Easy, frequent bruising is a common symptom of ITP.
How Bruises Form
After a bump or minor injury, blood can leak out of small blood vessels and pool under the skin without an opening, causing a bruise. Most bruises are common and fade without treatment. However, bruising can sometimes indicate an underlying medical condition or serious injury that requires medical attention.
Who Bruises More Easily?
Certain individuals are more susceptible to bruising:
- Elderly individuals: Aging leads to thinner, fragile skin and reduced elasticity.
- Women: They bruise more easily than men due to naturally thinner skin, more fat, less muscle mass, less collagen, and higher estrogen levels that can weaken blood vessel walls.
- Children under 10: Their skin is delicate and prone to injury.
- People with thin or fragile skin.
- Those on medications: Blood thinners (aspirin, warfarin, heparin), anti-platelet drugs, certain antibiotics, antidepressants, corticosteroids (cause skin thinning), and supplements like ginkgo biloba (cause blood thinning) can increase bruising.
- People with low platelets or bleeding disorders: Conditions like hemophilia A and B, von Willebrand disease, bone marrow disorders, and vasculitis can cause significant bruising even from minor injuries.
- Vitamin C or K deficiency may increase bruising, and genetics also play a role.
Appearance and Types of Bruises
Bruises can look different on various skin tones and vary in size: tiny red dots (less than 2 mm), large red-purple patches (4 mm to 1 cm), and larger blue-purple or black bruises (over 1 cm wide).
When to Consult a Doctor
It is best to see a doctor if you notice sudden, unexplained bruising; severe bruising; or if bruising does not fade within two weeks. Red flags include spontaneous bruises without injury, small red dots (petechiae), bleeding from other sites (gums, nose, heavy periods), and unexplained fatigue. Seek immediate care for a black eye with vision problems, a bruise lasting more than two weeks, large bruises that happen often, a lump (hematoma) in the bruised area, a bruise that recurs in the same area, unexplained bruising, or unusual bleeding such as nosebleeds or blood in urine or stool.
