Experimentar dolor en el pecho, dolor de cabeza y náuseas. ¿Qué ocurre?

I would recommend you to visit a doctor as soon as possible because these symptoms seem to indicate a serious health condition. A urologist or a general surgeon would be the right specialist to consult for your back pain, groin pain and abdominal pain. It is important to have a good diagnosis and treatment plan to avoid any more trouble.
 

Completing all vaccine­ doses remains crucial for protection. Symptoms like­ fever, headache­, and confusion indicate rabies. If these­ arise, promptly seek me­dical assistance. Prevention is e­ssential; stay updated on vaccinations.

Surgery is the only way to treat the appendix rupture. The rupture of an appendix can initiate severe complications, including infection and inflammation, and even be fatal. It is necessary to seek medical attention immediately, consult with a general surgeon, who is the expert in conducting appendix removal surgery.

Considering your symptoms, you could have a viral infection causing your sore throat and dry cough. But when, after taking the meds, you vomit, you doubt it and stop taking the medicine. You should consult an ENT specialist to start the treatment.
 

I would recommend you to see an ENT specialist to get your ear examined. Asymmetry of the ears may have a number of different causes: it may be genetic, traumatic or infectious. Only a specialist can be able to diagnose the reason for your ear's disparity and give the right treatment. It is always a wise idea to consult with a professional to make sure the results are as good as they can be.
 

Yes it is possible. Talk to your doctor the treatment may include antibiotics or other medications 

Washing hair and bathing with lukewarm (not too hot/cold) wate­r is fine if you have dengue­. Three days without feve­r or pain might mean you're improving. High feve­r, awful muscle/joint aches, rashes - typical de­ngue signs. Rest up, hydrate, and che­ck with a doctor if concerned.

You might not experience any symptoms if a bat bit you because their bites can be small. If you feel pain and nausea afterward, especially in your left shoulder, it could be a sign of rabies. Rabies is a serious brain virus that commonly occurs through animal bites. Hence, it is necessary to seek medical help without delay. Rabies may be prevented if treated early, hence, it is better not to take risks.

Fever is the result of the body struggling against intruders. Vomiting and headache are the things which appear when the body is trying to resist something that it does not like. For relief, find a cool place, and drink water and eat light, easy-to-digest foods. In the event these symptoms persist or worsen, visit a doctor.

Considering your symptoms of headaches and pain at the nape of the neck, it is suggested that you consult a physician. These symptoms can be attributed to the various factors like tension headache, cervical spondylosis, or may be migraine. It would be crucial to get a proper diagnosis and a treatment plan designed by a specialist.

Consult your doctor for specific advice on your son's pilonidal cyst wound. Reduced drainage, redness, and smell may indicate healing, still monitoring is required. Difficulty in packing as the wound shrinks is normal. If you have any concerns or or see signs of infection consult your doctor quickly. Follow their instructions for proper care.

You might be experiencing difficulty in sleeping. Sleeping only for 2-3 hours is not enough. Do you feel tired, irritable, or have difficulty concentrating during the day? It may be due to stress, caffeine, or electronic devices before going to bed. Try relaxation before bedtime, reducing caffeine intake, and creating a comfortable sleeping space. 

Please mention the diseases in detail or talk to your healthcare professional