¿Por qué sigo estornudando y teniendo secreción nasal?

It seems to be a fungal infection in your left armpit. I suggest you see a dermatologist to look into the rash, and get a medication accordingly. Deodorant should also be avoided as it might make the situation worse.
 

The signs you are experiencing e.g. Redness, itching, and rashes may be due to various reasons. This could be because of your allergies, stress, weather changes, or some products that could be irritants to your skin. To solve this, you can use gentle skincare products, stop the triggers you might think are causing the issue, and regularly wash and hydrate your skin.

Forehead acne is quite common. It can be because of the sebum the skin makes too much as it gets plugged and distresses the follicles. Isotretinoin is mainly used for the treatment of severe acne, so if your doctor has recommended it, it may indicate that your acne has become more severe and chronic. Make sure you are listening to your doctor and feel free to express your worries if you have any.

You may have an infection in the stitches on your hand. When pus comes out, it indicates that there is probably bacteria which is causing the infection. This might have occurred if the wound was not kept clean. If there was a large red lump previously, it could have been an abscess. It’s crucial to have this seen by medical professional because, without proper care, things like these can worsen.

HPV means human papillomavirus. You can’t get it from things like cups, clothes, doors, and keyboards. This virus is often spread through skin-to-skin contact. It can cause warts or even cancer in some cases. The best way to keep yourself safe from this virus is to get the HPV vaccine.