Warts on the fingers may be caused by this virus named HPV that gets into the skin through cuts or breaks in. Warts are raised lumps that sometimes have tiny black dots. To treat them you can try over-the-counter wart treatments or get a doctor's prescription. Wash your hands often and dry them well to avoid contamination of others with warts.

One of the most frequent concerns facing people is the openness of the pores. Open pores can cause rough and uneven skin. The causes of these pores usually include genetics, oiliness, sunburn, and even old age. One of the ways to decrease the face of open pores is to use salicylic acid or retinoids for day and night skin treatment. Regular cleansing of your face followed by application of sunscreen can also be helpful. 

Your testis might have some white spots, which probably are Fordyce spots. The latter is a harmless issue and common. They are small, raised, and painless. Oil glands that secrete too much oil end up clogging pores, and thus, we see these dots on the skin. Emotional tension or fluctuations in the levels of hormones could cause them. Usually, Fordyce spots do not require any treatment. 

Skin melanin treatment surgery can be harmful in the long run so I suggest not to go for it. You can try other treatments like chemical peels or dermabrasion instead. These treatments can help lighten the skin and are not harmful in the long run. Also using moisturizer and sunscreen can help.

Those whiteheads on your forehead are probably a type of acne called comedones. The hair follicles become blocked with oil and dead skin cells. Skin conditions can be accompanied by small, white bumps. One way is to use mild face washes with salicylic acid or benzoyl peroxide which can help remedy the clogged pores. 

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.

Initially, please consult with your parents. They may advise you some natural remedies or take you to a dermatologist. The dermatologist may suggest the best treatment for you depending on your age and skin type. Some natural remedies you can try for managing your pigmentation include applying a mask or use of a gentle exfoliator.