Why Do Both My Armpits Hurt and When Should I Be Concerned?

When both armpits hurt, one possibility is that the nerves between your neck and arms may be getting squeezed. This is known as brachial plexus compression and can sometimes happen if you use crutches a lot or engage in activities that strain your arms. Another cause might be axillary web syndrome, where tight, string-like bands form under the skin, causing pain on both sides. These issues are usually due to overuse, injury, or repetitive motions. Many times, this kind of pain is mild and goes away with rest, gentle stretching, or physical therapy. It might also simply be a normal ache that follows a busy day. However, you should be concerned and see a doctor if the pain continues for a long time, gets worse, or if you develop other symptoms like swelling, redness, numbness, or weakness in your arms. A doctor can examine you, help find the exact cause, and suggest the best treatment to help you feel more comfortable.