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- Birthmarks
In most cases, we do not know what causes birthmarks. Most are harmless, happen by chance and are not caused by anything the mother did wrong in pregnancy.
- Bisexuality
Bisexuality is when a person finds men and women physically, sexually or emotionally attractive.
- Bites and stings – first aid
If you are bitten or stung by an insect or animal, apply first aid and seek medical treatment as soon as possible.
- Bladder
Your bladder is a hollow organ that stores urine from the kidneys.
- Bladder cancer
Bladder cancer affects around 3 times as many men as women.
- Bleeding
Bleeding may be minor or it may be a life-threatening medical emergency.
- Blepharoplasty (eyelid surgery)
Eyelid surgery, or blepharoplasty, aims to improve the appearance of the upper eyelids, lower eyelids or both.
- Blepharospasm
Blepharospasm means involuntary twitching, blinking, closure or squeezing of the eyelids.
- Blisters
A blister is one of the body's responses to injury or friction.
- Blood and blood vessels
Information about bleeding, blood pressure, conditions, risks and blood products.