### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi there, I have had this problem for around 4 months now. My ears constantly feel blocked, I can hear but sometimes they re popped. Sometimes its painful, there s an immense amount of pressure and when I swallow or move my jaw I can feel creaking in my throat and hear it in my ears. On the right side of my head, there is a feeling of bruising at the back of my skull and a small pea sized lump just above my neck. I constantly feel tired and heavy and I have developed an itchy rash over my chest, stomach, arms, thighs and back. HELP! :(

### output:

Hi, I can understand your concern for bruising at the back of skull and rashes over body. Regarding the problem of bruises which we call medially as "purpuric or ecchymosis spots" is common condition seen due to multiple causes. In your case it can be a normal phenomenon or can be due to other causes. To guide you elaborately- Bruise or the purpura is simply formed due to extravasation and collection of red blood cells from the vessels under the skin. This results in formation of reddish spots which we call as Bruise in simple language. There are multiple of factors causing extravasation of red blood cells from the vessels-1. Due to trauma to the small blood vessels of the skin.2. Due to some problem in the platelets (the cells which prevents the extravasation of red blood cells from the vessels and forms the clot).3. Due to problem with the coagulation factors which helps in repair of the injury to blood vessels and helps in clot formation.4. Due to combination of all these factors. For the best part of the diagnosis there are simple tests of platelet function and coagulation factors done routinely in all the simple laboratories to rule out the exact cause of the problem. If these tests are normal then you can rest assured and relieve your tensions regarding the rash. Otherwise, also if the test are abnormal then also can be very well treated without any problem. All the best.