¿Por qué tengo un bulto en el seno derecho, hinchado y doloroso?

You may have hyperpigmentation after inflammation, which is a consequence of skin inflammation such as a fungal infection. The dark color of the skin is the result of the skin's recovery mechanism. A gentle exfoliating scrub or a vitamin C-rich skin-brightening cream are examples, you can fade the pigmentation by trying them. It is important to use an SPF product as UV rays can aggravate the pigmentation.

It’s normal for your 1.8-year-old daughter to have fine hair in those areas. It could be because her dad is hairy – sometimes it runs in the family. These hairs are not a problem and do not require any treatment. As she gets older these hairs may become thicker, but that is fine too. 

Fungal infections in are­as like your thighs cause redne­ss, itchiness, and rashes. These­ infections thrive in warm, moist environme­nts. It's crucial to avoid exercises until the­ infection clears up. Sweat can worse­n the condition. To treat it effe­ctively, keep the­ affected area cle­an and dry. Use an antifungal cream as directe­d. Wear loose, breathable­ clothing. Once the infection re­solves completely, you can re­sume exercise­s for weight loss without concerns.

Body pain and a black face could signal ane­mia - not enough red blood cells. Ane­mia makes you tired, pale, and achy. Eating iron-rich foods he­lps: spinach, beans, meat. Drink lots of water, re­st well too. See a doctor if it doe­sn't improve.

Dandruff is a fungal infection and there is not permanent cure for dandruff.

No, blood donation is not recommended, while undergoing PRP treatment for at least 3-4 weeks.

It is possible that the black vertical line on the boy's thumb nail is a result of a melanonychia striata, which is a linear nail melanin pigmentation. It is relatively common in children and is generally harmless. However, it is important to have it evaluated by a doctor, especially if it is growing, to rule out any underlying medical conditions.

Bruising and discomfort after sclerotherapy are natural which normally resolves within a few days. But since you said your veins look worse and are more visible after the procedure could indicate a complication. It's good that you have already spoken with your doctor, but still experiencing discomfort or have any concerns, follow up with them promptly. 

In some cases the veins may fade on their own over time, but if the issue is related to the sclerotherapy procedure, additional treatment can be needed. Its best to follow up with your doctor to discuss your options and determine the best treatment.