¿Podría causar sangrado arrancar una mancha negra cerca de la uretra?

Ringworm is persiste­nt and tough to treat. It is a fungal infection causing circular, red, itchy patche­s on the skin. This fungus thrives in warm, damp environme­nts. To eliminate it, you'll require­ an antifungal medication like terbinafine­ or clotrimazole. Keep the­ affected area cle­an and dry. Consistent use of the me­dication for two weeks should help re­solve it. 

When your skin feels itchy, turns red and sometimes swells up it's called itching eczema or dermatitis. This could happen if your skin is sensitive to things such as soap, fabrics even stress. To relieve the condition, consider mild bathing soaps, and gentle moisturizers as well as resist scratching at all costs. If this doesn’t work out then you should see a dermatologist who can prescribe some special creams

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. 

When treating pimples, it's better to avoid chewing medicines that are meant to be swallowed. Chewing them may reduce their effectiveness, as the medicine works best when taken as directed. Topical treatments prescribed by a doctor may work better. Keep your face clean, avoid touching or picking at pimples, and follow a healthy skincare routine for the best results.

It looks like you have bad case of ringworm which did not respond to the OTC medicines. I suggest that as soon as possible you see a dermatologist who specializes in fungal infections. They may give you oral antifungal medicine and topical treatment to improve the result. Seek urgent medical care since untreated ringworm can cause problems.
 

Fordyce spots are the glands which are present in everybody. These are normal and atomical structures that are more visible in few people and it is completely normal to have them. First it is advised to avoid treatment for the same. If somebody desires for cosmetic treatment then it can be taken care with radiofrequency ablation or carbon dioxide laser which will remove the glands.