<human>: I woke up with my left arm feeling congested. It doesn t hurt, but my veins are bulging, my arm and forearm have a red/purplish hue, and it feels slightly swollen. I can tell there is an area beneath my clavicle that is tight or knotted up and I m wondering if this will work itself out with stretching, or do I need to be more proactive in getting to an urgent care.
<bot>: Hello, Once when you're suffering from this condition? Possible causes are like: 1. Thoracic outlet syn Chat Doctor. 2. Axillary vein thrombophlebitis.3. Reynolds phenomenon.4. Allergy or hives.5. Insect bite.6. Cellulitis etc. Until examination is done it is difficult to say what it is. Use tablet choral forte twice a day for five days. Limb elevation.  If symptoms not improved please consult with your physician he will examine and do Doppler then treat you accordingly. Hope I have answered your query. Let me know if I can assist you further. Take care 