A low number of platelets in the blood. Platelets, called thrombocytes, are colorless blood cells that help blood clot.

Self-care options include avoiding activities that could cause injury, drinking alcohol in moderation, if at all, and using caution with pain relievers available without a prescription, such as aspirin and ibuprofen.

Seek medical care immediately if there is:

• Uncontrolled bleeding.

Make an appointment to see a health care professional if there is:

• Easy bruising.
• Prolonged bleeding from cuts.
• Rash of pinpoint-sized spots, usually on lower legs.
• Bleeding from gums or nose.
• Blood in urine or stool.