Is it your forearm? It could be carpal tunnel
Hi I had this with my last pregnancy I was around 12 weeks & I woke up like it one morning! It was so hard to even walk witch sounds crazy as it way my arm but its amazing wot muscles u use & dont realise it! I went to the doctor she sed wen pregnant ur muscles r more flexible so its easier to pull one she told me to use deep heat on it & a hot water bottle & take paracetamol it worked! Was gone in a couple of day's :-) just keep heat on it :-)
Mine was more the top ofy arm near my sholder btw if its lower like below ur elbow & in ur thumb it may be carpol tunnel u can get cream for this also :-)
its mainly the top of my arm and a little between my wrist and my elbow..its not in my hand or thumb tho..so i expect its what mrsemmett said..ill take some paracetamol and get some heat on it..thankyou girls!!