2. Itch
Your armpit will itch a little after you shave because new hair is coming out. But if the itchiness persists, then it is a problem. It can be a reaction from the razor or any product used on the skin. If dead cells or red spots appear, that could mean fungal infection as well. Consult a doctor fast.
3. Rash
Our armpits are always warm and wet and that is the kind of place where yeast can form. This can cause a major reaction which will result in rashes forming on your skin. This skin reaction can also be due to repeated friction with our clothes. So, the best thing to do in such a situation is to go and consult a doctor, a skin specialist who will be able to guide you in the right direction.