Conversation: The conversation between human and AI assistant.
[|Human|] I have a sudden onset of left arm swelling and pressure/aching over the past week with no trauma or injury. I also have some upper trap pain/tightness and pain in my armpit. Swelling is worse after activity like washing my hair. Usually the swelling is down in the morning. What can this be?
[|AI|]  Hi, Thanks for your query. There are multiple reason for your pain and swelling in left arm as bellow.1. If its first time and there is no numbness or radiating pain from neck to arm and hand then it can be only muscular pain at arm level.2. If it's paining from neck to arm and hand as well this kind of pain use to be there on and off with you then it can be related to your cervical spine. 3. If the pain starts from shoulder joint and this is the first time you experience it after lifting weight or having any jerk to shoulder then it can be related to shoulder joint soft tissue pain also which is coming to upper arm. Now what ever the case is initial treatment is use hot and cold pack at home and look for the relief. If it is not getting all right then you need to visit an or tho for proper examination and evaluation. Here with physical test and x-ray they will evaluate it and may ask for MRI if needed. I do hope that you have found something helpful, and I will be glad to answer any further query. Take care