If you have developed thrombosis after an injection and ice is not helping, you should see a doctor. Treatment may include warm compresses, pain-relief medicines, or blood-thinning treatment, depending on the severity.

A blood clot with knee swelling is a serious condition and needs prompt medical care. Treatment usually includes blood-thinning medicines (anticoagulants), rest and leg elevation, and sometimes compression stockings. The exact treatment depends on the clot's size and location, so see a doctor immediately for proper tests and safe management.

Bruising or clot marks on the arm after a blood test are common and usually fade on their own within 1 to 2 weeks. You can apply a warm compress after 24 hours to help it heal. See a doctor if the area becomes very painful, swollen, or does not improve, or if you are on blood thinners.