Why is a red mass coming from my belly button?

It seems like you’ve done a good job taking care of the metal puncture wound by cleaning and sterilizing it. Because you had a tetanus injection in the past year, you are likely to be immune to tetanus. However, watch for redness, swelling, heat, or pain in the area. If any of these symptoms occur, seek medical attention. 

It is uncommon, that Bactrim might cause a yeast infection. This happens because the good and bad bacteria equilibrium in the body can be tipped by Bactrim thus allowing yeast to thrive. Among the symptoms are itching, redness, and a thick discharge. Probiotics and antifungal medicines can be used to cure this. It’s also a good idea to talk with your doctor about other possible medications.

It's a common issue when sweat and oils get trapped in our skin pores. Prolonged sitting can make it even worse. The best over-the-counter treatment is to use a mild cleanser with salicylic acid to shrink the pores. To that end, also, take breaks from sitting and keep the area clean and dry. Stay hydrated and wear loose, breathable clothing. 

Acne occurs when you have these red spots on your face caused by your skin producing too much oil. It's super common, especially during the teenage years. To help, you can use a face wash with benzoyl peroxide or salicylic acid. These can clear up your skin by unclogging your pores.

The burning or pain you might be feeling is from the drugs you are using. To relieve the discomfort, you can use a mild soothing cream such as Vaseline or aloe vera gel which will help to ease the irritation and give some relief. Ensure that the region is kept dry and clean to quicken the healing process.

If you notice some vein-like structures on your penis glans, those are likely just normal blood vessels that have become more visible. You may notice this more during arousal. Usually, it’s not anything to worry about and doesn’t need treatment. However, if they are causing you pain or discomfort, or if they have appeared suddenly, it would be best for you to see a doctor so they can be evaluated further.

It is best to consult with a dermatologist to get an accurate diagnosis and treatment plan for your melasma. Depending on the severity of your melasma, they may recommend a combination of topical and laser treatments, chemical peels, lightning creams. Recommended limiting sun exposure and wearing sunscreen with a high SPF rating, to reduce your risk of further melasma flare-ups.

You may have something referred to as a perianal abscess. When bacteria infect a tiny gland around the anus, this can cause a painful lump. Soaking in warm water may help relieve discomfort. Don’t squeeze or pop it—try to keep the area clean instead. If it becomes worse or doesn’t get better, you should go see your doctor for more help.