What should I do if I get a black purple lump from patting the crook of my arm?

Shooting black purple lumps in the crook of the arm may be caused by excessive force, thrombocytopenia, allergic purpura, etc., and the symptoms can be relieved by general treatment and medication.
1. Excessive force: shoot black purple patches in the crook of the arm may be due to excessive force caused by capillary rupture, if the symptoms are not obvious, may not intervene in the treatment, while paying attention to the protection of the affected area, recovery can be self.
Can also be through the hot water bag, salt bag and other hot compresses on the affected area, in order to alleviate the symptoms.
2. Thrombocytopenia: For patients with such symptoms caused by thrombocytopenia, activities should be appropriately limited to avoid trauma, and glucocorticosteroids, such as prednisone, etc.; immunosuppressants, such as azathioprine, etc.; pro-platelet generating drugs, such as Eltrombopoietin, romastigmine, etc., can be prescribed for treatment to improve symptoms.
3. Anaphylactic purpura: patients can follow the doctor’s instructions to take antihistamines, such as loratadine, chlorpheniramine, etc.; improve vascular permeability of drugs, such as vitamin C, triclosan, etc.; immunosuppressants, such as cyclophosphamide, etc. to carry out treatment.
It is recommended that patients strictly follow the doctor’s instructions for the correct use of drugs, do not change the dose of drugs or abuse drugs, so as not to affect the therapeutic effect, and pay attention to observe the changes in the affected area, if the symptoms continue to worsen should be timely medical consultation and treatment.