What can I do about chaffing and heat rash?

Vitamin B12 and vitamin D deficiency lead to hair loss. It is advised that you see a dermatologist and an endocrinologist for a thorough examination and treatment.
 

The penis area hair loss reason can be different. The rubbing of garments or activities is a common one. Also, psoriasis or fungal infections may cause hair to drop in that location. Use antidandruff medicine if it itches or appears red, keep it neat and dry besides dressing with comfortable clothes regularly is essential for preventing more hair fall in this region. 

It seems like you’ve got post-inflammatory hyperpigmentation after popping your zits. These can result in dark marks on your face. To fade them away, consider trying out products that contain vitamin C, niacinamide, or kojic acid as ingredients. Sun protection is key since UV rays can worsen the appearance of these spots. Also, remember not to irritate your skin further to avoid more dark spots.

Your piercing might cause some trouble. Sometimes, the hole on top of your skin may close up while the earring remains stuck from behind. This can happen when the skin wraps around the back of the earring. You might experience pain, redness, or swelling. To solve this, you can gently try pushing the earring out from the back or seek help from a professional piercer. Never force it out, as that can cause more harm.

Pimples occur when oil and dead skin cells block hair follicles thus leading to a condition called acne. The marks are usually a result of inflammation in the skin. Instances that can be white spots and not consistent in color are marks of hyperpigmentation. Be gentle to your skin, do not pick your skin, and use products with salicylic acid or benzoyl peroxide. 

It should be known that these things are quite usual and mostly innocent. They could be what is referred to as the Fordyce spots which simply put are oil glands. However, if there is any form of pain or itching accompanying them then it would be wise to see a medical practitioner who will advise accordingly. Hernias usually show themselves as bulges or swellings around the groin so there’s little chance they could be connected with the description of the said spots. To be sure, though, having them checked out by a healthcare provider would still do no harm!

You are suffering with perioral pigmentation problem. You have already tried lots of topical applications. Cosmetic advance treatments can help you further like peels and glutathione.