Why do I have itching in scrotal sac?

For this type of condition, one should consult a dermatologist. The rash may involve several causes, which include allergic reactions and skin infections. In case you have already had STI testing and treatment, the rash should be diagnosed by a specialist.

Itchy skin can cause these marks when scratched frequently irritating the area. To help them heal faster, try not to scratch them more; instead use mild lotions such as aloe vera. Additionally, ensure that the affected region is kept clean and dry always;  however, with time they will go away automatically if it takes long without any changes make a point of visiting a doctor for further assistance though you need to be patient since the healing process may vary from one person to another.

Freckle­s appear as tiny, light brown spots that dot the skin, espe­cially on sun-exposed areas like­ the face. They're­ harmless markings. But for some, freckle­s become an aesthe­tic concern. To fade freckle­s, wear sunscreen and a hat whe­n outdoors. Opt for skin care products enriched with vitamin C or re­tinol. If self-conscious about freckles, conce­al them with makeup. Reme­mber, freckles are­ natural and require no medical inte­rvention.

Dark skin patches and acne can occur due to sun exposure, hormonal changes, or clogged pores. To improve your skin, use gentle cleansers, keep your skin moisturized, and avoid harsh products. Drink plenty of water, eat healthy food, and resist picking at acne to prevent scarring. Also, protect your skin from the sun to reduce further darkening.

Based on your symptoms, it may be an infection. Seek medical attention

Yes, cysts and papules can be treated with various treatments such as  antibiotics, topical creams, laser treatments and surgery.  I advise you to consult a qualified doctor. Based on proper assessment of your problem, he may be able to suggest the most appropriate treatment for your pimples. 

Sunburn is one of the reasons it can happen. Prolonged exposure to the sun can cause your skin to become dark. So, you can apply a cream with aloe vera or cucumber to cuddle your skin. Another recommendation is to wear sunblock when you are going outdoors to keep your face protected.