Can hypodermic needle inject drum bag?

It is normal to have a bulge in a subcutaneous needle injection. Subcutaneous injection is the injection of liquid medicine into the tissue under the skin. The common injection site is the upper arm and lateral femoral, often used for vaccine and vaccine vaccination, local anesthesia and some drug injection. Lumps can occur in one of three ways:

1. When subcutaneous injection, if the injection liquid is too much, local tissue absorption is relatively slow, and swelling will occur.

2. In the early stage of subcutaneous injection, the fluid remains in the subcutaneous retention, causing the occurrence of liquid edema, which takes about 3-5 days to be absorbed by itself, without scar and pigmentation.

3. After subcutaneous injection, local aseptic inflammatory reaction is often caused by drug reaction, soft tissue injury and local stimulation of needles.

Therefore, the lumps that appear within 3 days after subcutaneous injection can be observed without special treatment. 3 days later, there are still painless lumps, which can be gradually eliminated by hot compress or external application of raw potato chips, considering that local aseptic inflammatory reaction forms nodules. But if there is redness, fever, pain and other manifestations in addition to local swelling, there may be infection, need to see a doctor, follow the doctor's advice to take antibiotics for treatment.

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