Help: Sudden underarm odor after shaving

Skin Type:

Combination (not sure, but my body skin is normal;

underarms tend to get sweaty)

Age/Gender:

17 / Female

Current Skincare Routine:

I don’t really have a specific skincare routine for my underarms. I use tawas (alum) as deodorant. When I clean my underarms, I usually use Safeguard soap. I shower daily and sometimes use deodorant. I do use tawas, but sometimes I skip it when I’m just at home. I recently started shaving my underarms completely.

AM:

Shower + deodorant

PM:

Quick body wash / sometimes I forget to properly clean my body

Main Concerns:

I suddenly started having underarm odor after shaving my armpits completely. Before shaving, I didn’t really have this problem even when I sweat.

After shaving, my friend noticed I smelled like “body odor,” and recently my mom also noticed the smell on my clothes.

At first I thought it might be my clothes (I wore non-cotton fabric before), but even after switching to cotton, I still sometimes notice the smell.

I also noticed that my clothes seem to retain sweat odor more easily now, even if I don’t sweat that much.

Before shaving, I had thicker underarm hair but didn’t experience this issue. Now, even a small amount of sweat seems to cause odor. I’m confused because I thought more hair causes more odor since it traps bacteria, but my experience is the opposite—things got worse after shaving.

Budget:

Affordable (drugstore products only)

Additional Info:

No known allergies. I just want to understand why this suddenly happened and how to fix it.