My left inner arm from my arm pit to my hand is achy and my hand feels weak.  I also have not felt well today.  Im nauseous and have a stiff neck and headache.  I have not had chest pain, but have had a little trouble breathing (I also have asthma).  I am just wondering if its a flu or something more serious.
Hello and welcome to Chat Doctor forum! Thank you for the query, The symptoms you suggest are that of a flu, if it doesn't go down in a day, so please visit your GP and take the following precautions if you're in India since it's a rainy season 1.  Chat Doctor.  Avoid outside foods3. Avoid meats4. Take lighter meals5. Take a lot of rest, as this helps your body to recoup and make to feel more energetic after you get well. However if this persists for a longer time kindly undergo blood tests and visit your doctorWishing you best of health